Uber Technologies Inc. is being investigated by the U.S. Equal Employment Opportunity Commission stemming from a complaint about gender inequity, the Wall Street Journal reported on Monday, citing people familiar with the matter.

As part of the probe, which began last August, EEOC investigators have been interviewing former and current Uber employees as well as seeking documents from its executives, the WSJ report said.

The investigators have been seeking information related to hiring practices, pay disparity and other matters as they relate to gender, the WSJ report said.

Last week, Uber Chief People Officer Liane Hornsey resigned after an investigation into how she handled allegations of racial discrimination at the ride-hailing firm.

An EEOC spokesman said complaints made to the commission are strictly confidential and it is prohibited from even confirming or denying the existence of such a charge.

Uber did not immediately respond to a request for comment.