Barcelona Cabs Strike Against Uber Taxi App
  • Barcelona Cabs Strike Against Uber Taxi App
  • BARCELONA, SPAIN - JULY 01: In this photo illustration, the app 'Uber' is launched in a smart phone on July 1, 2014 in Barcelona, Spain. Taxi drivers in main cities strike over unlicensed car-halling services. Drivers say that is a lack of regulation behind the new app. (Photo Illustration by David Ramos/Getty Images)
  • Image Credit: David Ramos via Getty Images
Mideast Egypt Uber
  • Mideast Egypt Uber
  • Anthony Khoury, head of Middle East and Africa expansions for Uber, displays the application on a mobile phone during an event to celebrate the official launch of the car-hailing service in Cairo, Egypt, Tuesday, Feb. 10, 2015. Cairo soft launched the company in Nov. 2014. Uber is now in over 270 cities in 55 countries, according to the company. (AP Photo/Mosa'ab Elshamy)
  • Image Credit: ASSOCIATED PRESS
Uber Lyft Employees or Contractors
  • Uber Lyft Employees or Contractors
  • In this photo taken Tuesday, Dec. 16, 2014, a man leaves the headquarters of Uber in San Francisco. (AP Photo/Eric Risberg)
  • Image Credit: ASSOCIATED PRESS
Uber Surge
  • Uber Surge
  • This Friday, Nov. 21, 2014, photo taken in Newark, N.J., shows smartphones displaying Uber car availability in New York. Uber is offering car service in 250 cities in 50 countries now, up from 60 cities in 21 countries just a year ago. Uber hasn’t released its financial figures to the public, so valuing the company is pure guesswork. (AP Photo/Julio Cortez)
  • Image Credit: ASSOCIATED PRESS
Uber Launch-Nevada
  • Uber Launch-Nevada
  • Uber West Coast Regional Manager William Barnes sits in the back of a car during a photo shoot Friday, Oct. 24, 2014, in Las Vegas. The ride sharing company has begun operations in Nevada. (AP Photo/John Locher)
  • Image Credit: ASSOCIATED PRESS
India Uber Asia
  • India Uber Asia
  • In this April 3, 2014 photo, a smartphone is mounted on the glass of an Uber car in Mumbai, India. Riding on its startup success and flush with fresh capital, taxi-hailing smartphone app Uber is making a big push into Asia. The company has in the last year started operating in 18 cities in Asia and the South Pacific including Seoul, Shanghai, Bangkok, Hong Kong and five Indian cities. (AP Photo/Rafiq Maqbool)
  • Image Credit: ASSOCIATED PRESS
INDIA-CRIME-RAPE-TRANSPORT-UBER
  • INDIA-CRIME-RAPE-TRANSPORT-UBER
  • The Uber smartphone app, used to book taxis using its service, is pictured over a parking lot as auto-rickshaws (background) ply a road in the Indian capital New Delhi on December 7, 2014. An Uber taxi driver allegedly raped a 25-year-old passenger in the Indian capital before threatening to kill her, police said December 7, in a blow to the company's safety-conscious image. AFP PHOTO/TENGKU BAHAR (Photo credit should read TENGKU BAHAR/AFP/Getty Images)
  • Image Credit: TENGKU BAHAR via Getty Images
Grand Tasting Presented By ShopRite Featuring KitchenAid® Culinary Demonstrations Presented By MasterCard - Food Network New York City Wine & Food Festival Presented By FOOD & WINE
  • Grand Tasting Presented By ShopRite Featuring KitchenAid® Culinary Demonstrations Presented By MasterCard - Food Network New York City Wine & Food Festival Presented By FOOD & WINE
  • NEW YORK, NY - OCTOBER 18: A general view of atmosphere at the Uber Technologies station at the Grand Tasting presented by ShopRite featuring KitchenAid® culinary demonstrations presented by MasterCard during the Food Network New York City Wine & Food Festival Presented By FOOD & WINE at Pier 94 on October 18, 2014 in New York City. (Photo by Bryan Bedder/Getty Images for NYCWFF)
  • Image Credit: Bryan Bedder via Getty Images
Uber Taxi App In Madrid
  • Uber Taxi App In Madrid
  • MADRID, SPAIN - OCTOBER 14: In this photo illustration the new smart phone taxi app 'Uber' shows how to select a pick up location at Atocha Station on October 14, 2014 in Madrid, Spain. 'Uber' application started to operate in Madrid last September despite Taxi drivers claim it is an illegal activity and its drivers currently operate without a license. 'Uber' is an American based company which is quickly expanding to some of the main cities from around the world. (Photo by Pablo Blazquez Dominguez/Getty Images)
  • Image Credit: Pablo Blazquez Dominguez via Getty Images
Uber Taxi App In Madrid
  • Uber Taxi App In Madrid
  • MADRID, SPAIN - OCTOBER 14: In this photo illustration the new smart phone taxi app 'Uber' shows how to select a pick up location at Puerta de Alcala Square on October 14, 2014 in Madrid, Spain. 'Uber' application started to operate in Madrid last September despite Taxi drivers claim it is an illegal activity and its drivers currently operate without a license. 'Uber' is an American based company which is quickly expanding to some of the main cities from around the world. (Photo by Pablo Blazquez Dominguez/Getty Images)
  • Image Credit: Pablo Blazquez Dominguez via Getty Images
Uber Taxi App In Madrid
  • Uber Taxi App In Madrid
  • MADRID, SPAIN - OCTOBER 14: In this Photo Illustration a smart phone displays a picture with the logo of the news taxi app 'Uber' as people walk past on October 14, 2014 in Madrid, Spain. 'Uber' application started to operate in Madrid last September despite Taxi drivers claim it is an illegal activity and its drivers currently operate without a license. 'Uber' is an American based company which is quickly expanding to some of the main cities from around the world. (Photo Illustration by Pablo Blazquez Dominguez/Getty Images)
  • Image Credit: Pablo Blazquez Dominguez via Getty Images
Uber Taxi App In Madrid
  • Uber Taxi App In Madrid
  • MADRID, SPAIN - OCTOBER 14: In this photo illustration the new smart phone taxi app 'Uber' shows how to select a pick up location at Atocha Station on October 14, 2014 in Madrid, Spain. 'Uber' application started to operate in Madrid last September despite Taxi drivers claim it is an illegal activity and its drivers currently operate without a license. 'Uber' is an American based company which is quickly expanding to some of the main cities from around the world. (Photo by Pablo Blazquez Dominguez/Getty Images)
  • Image Credit: Pablo Blazquez Dominguez via Getty Images
Uber Taxi App In Madrid
  • Uber Taxi App In Madrid
  • MADRID, SPAIN - OCTOBER 14: In this Photo Illustration a smart phone displays a picture with the logo of the news taxi app 'Uber' outside Plaza de Toros Las Ventas on October 14, 2014 in Madrid, Spain. 'Uber' application started to operate in Madrid last September despite Taxi drivers claim it is an illegal activity and its drivers currently operate without a license. 'Uber' is an American based company which is quickly expanding to some of the main cities from around the world. (Photo Illustration by Pablo Blazquez Dominguez/Getty Images)
  • Image Credit: Pablo Blazquez Dominguez via Getty Images
Uber Taxi App In Madrid
  • Uber Taxi App In Madrid
  • MADRID, SPAIN - OCTOBER 14: In this photo illustration the new smart phone taxi app 'Uber' shows how to select a pick up location next to a taxi lane on October 14, 2014 in Madrid, Spain. 'Uber' application started to operate in Madrid last September despite Taxi drivers claim it is an illegal activity and its drivers currently operate without a license. 'Uber' is an American based company which is quickly expanding to some of the main cities from around the world. (Photo by Pablo Blazquez Dominguez/Getty Images)
  • Image Credit: Pablo Blazquez Dominguez via Getty Images
German Court Bans Uber Service Nationwide
  • German Court Bans Uber Service Nationwide
  • BERLIN, GERMANY - SEPTEMBER 02: In this photo illustration, a woman uses the Uber app on an Samsung smartphone on September 2, 2014 in Berlin, Germany. Uber, an app that allows passenger to buy rides from drivers who do not have taxi permits, has had its UberPop freelance driver service banned in Germany after a complaint by Taxi Deutschland, a trade association of taxi drivers in the country. The company, which operates in 42 countries over 200 cities worldwide, plans to both appeal the decision made by a court in Frankfurt as well as, at the risk of heavy fines, continue its services in Germany until a final decision has been made on the matter. (Photo by Adam Berry/Getty Images)
  • Image Credit: Adam Berry via Getty Images
The San Francisco district attorney announced Wednesday the expansion of a consumer-protection lawsuit aimed at Uber's claims about driver background checks. District Attorney George Gascon said Wednesday that the growing ride-hailing company continues to unfairly claim it is rigorously checking the background of its drivers. Gascon said Uber can't make that claim unless it puts it drivers through the same fingerprinting process required of taxi drivers in California.

Gascon made his comments a day after his office filed an expanded lawsuit in San Francisco Superior Court accusing Uber of false advertising. The expanded lawsuit claims Uber failed to uncover the criminal records of 25 California drivers, including several registered sex offenders and a convicted murderer. "This is really only scratching the surface," Gascon said at a news conference.

Gascon and Los Angeles County District Attorney Jackie Lacey filed the original lawsuit in December. The lawsuit doesn't object to Uber's background checks, but it objects to the company's claim that it uses an industry-leading process to vet its drivers. Anything short of fingerprinting can't make that claim, Gascon said.

In a statement Wednesday, Uber said it disagrees with Gascon. Company spokeswoman Jessica Santillo said that no background check system is flawless and its checks are just as detailed as with taxi drivers.

Santillo said Uber ran background checks of "hundreds" of California taxi drivers and uncovered convictions for drunken driving, rape, attempted murder, child abuse and violence.

The two California district attorneys settled a similar lawsuit with Uber competitor Lyft last year. Lyft agreed to pay $250,000 and to stop claiming its background checks were among the best in the industry.

Uber and its competitors have encountered various political hurdles as they expand services.

Government entities around the globe are grappling with how to regulate and monitor ride-hailing companies. Taxi and limousine drivers and companies complain that the app makers should be subjected to the same regulations and fees they face around the world.

The ride-booking companies counter that their drivers are private contractors who use the startups' technology to find customers in need of rides.

Uber, in particular, is fighting numerous legal and regulatory battles as it aggressively expands worldwide. The San Francisco-based company says it looks "forward to resolving this issue" with the California district attorneys.

The AP contributed to this report.

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