Rep.-elect Brian Poindexter’s campaign acknowledged Friday that the Ohio Democrat is the subject of a sexual harassment investigation, days after two House Democratic groups removed their endorsements of him.

A campaign spokesperson said Poindexter had given a volunteer what he believed was “an innocuous compliment” and later learned that it had made her uncomfortable. The spokesperson said Poindexter “felt awful” and that the campaign began working with an outside human resources firm to examine the matter.

“Neither Brian nor the campaign ever wants anyone to feel uncomfortable,” the spokesperson said.

The Democratic Congressional Campaign Committee has hired an independent firm to investigate allegations against Poindexter, Executive Director Julie Merz said in a Friday statement. The firm will conduct interviews and gather facts about any inappropriate behavior, she said.

Merz said the DCCC takes the allegations seriously and has asked for an investigation that is “swift, thorough and transparent.” The committee will comment further when it is complete, she said.

POLITICO has not confirmed the details of the allegation. Punchbowl News previously reported the DCCC’s statement.

Poindexter defeated Republican Rep. Max Miller in a Cleveland-area district after a heated race that drew national attention. Miller faced domestic abuse allegations connected to his divorce, which he denies.

Around Election Day, the political arms of the moderate Blue Dog Coalition and the Congressional Progressive Caucus removed their endorsements of Poindexter. In a joint statement, Blue Dog PAC and CPC PAC said they learned of a report of alleged sexual harassment in the campaign’s final days, informed the DCCC and connected the individual with legal advocacy and support services.

The groups said the woman requested that they not publicly disclose details, to protect her identity and give her time to decide how to proceed. They said they respected her wishes but withdrew their endorsements pending the investigation.

Asked Tuesday about the endorsements during a brief Capitol Hill interview, Poindexter said his focus was on setting up his office and learning the political landscape. “Nothing to read into that,” he said.