June 22 (Reuters) - A group of shareholders on Monday filed a lawsuit against the board of directors of Uber Technologies Inc., accusing management and board members of allowing lax compliance with regulatory standards, which led to thousands of lawsuits from victims of sexual abuse and harassment.

In a complaint filed with federal court in San Francisco, shareholders led by a Detroit pension fund said that board members ignored repeated internal and external warnings about Uber's alleged failure to address harassment and other sexual abuse issues by drivers.

Shareholders noted that oversight failures were also a factor in two lawsuits filed by the federal government last year.

One lawsuit accused Uber of routinely refusing to serve passengers with disabilities, including those with assistance animals or those using stowable wheelchairs. Another lawsuit alleged deceptive billing and cancellation practices in its subscriber service, Uber One.

The complaint stated that "Uber repeatedly violates compliance rules" and that its reputation has been "irreparably damaged" by negative media coverage.

A spokesperson for San Francisco-based Uber said the lawsuit "ignores important facts and is based on misleading and false narratives derived from other baseless lawsuits, which we have already addressed publicly and in court."

CEO Dara Khosrowshahi is one of the defendants.

Shareholders said that during his nearly nine years as chief executive, he was "less daring in pushing regulatory boundaries" than his predecessor, but continued to be lax in compliance with standards.