House Minority Leader Nancy Pelosi is asking the House Ethics Committee to investigate allegations of child sex abuse against California Rep. Tony Cárdenas.

A civil lawsuit has been filed against Cárdenas in Los Angeles County alleging that in 2007, when he was a member of the city council, he groped a 16-year-old girl. Cárdenas, who holds a junior position in Democratic leadership, denies the allegations.

“I have spoken with Congressman Cárdenas and he appropriately asked us to withhold judgement until there is a full investigation of the facts,” Pelosi said.

“As Members of Congress, we each have a responsibility to uphold the integrity of the House of Representatives, and any type of alleged misconduct must be investigated by the Ethics Committee,” she added. “Congressman Cárdenas said he will fully cooperate with an Ethics investigation.”

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