The Democratic Congressional Campaign Committee has hired an independent firm to investigate allegations of inappropriate behavior involving Brian Poindexter, the Ohio Democrat who defeated Republican Rep. Max Miller in last week’s midterm elections.

The inquiry places Poindexter under scrutiny only days after his victory in Ohio’s 7th Congressional District. He is scheduled to join a Democratic controlled House when the 120th Congress begins.

The DCCC confirmed the investigation Friday and said it was treating the allegations seriously. The House campaign arm did not specify what conduct prompted the complaints or describe the nature of the alleged inappropriate behavior.

“The DCCC has been made aware of the allegations and takes them seriously,” DCCC Executive Director Julie Merz said in a statement.

“In the interest of fairness to all parties involved, we have hired an independent, third-party firm to investigate any instance of inappropriate behavior, conduct interviews and gather the facts.”

Merz said the committee had requested a “swift, thorough and transparent” investigation. She said the DCCC would offer further comment after the outside firm completed its work, but she provided no additional details about the allegations.

Poindexter’s campaign did not immediately respond to a request for comment from MS NOW. A campaign spokesperson did, however, provide CNN with an account of the interaction at the center of the matter.

According to the spokesperson, Poindexter made what he believed was an “innocuous compliment to a volunteer.” The spokesperson added that “he heard later that it made her feel uncomfortable and he felt awful.”

The campaign is also working with an outside human resources firm to investigate the matter, according to the spokesperson. That review is separate from the independent investigation commissioned by the DCCC.

The scrutiny arrives as Poindexter prepares to establish his congressional office after flipping a competitive Republican held district. It also follows changes in his standing with two Democratic political groups that had supported his election campaign.

The Blue Dog PAC and the Congressional Progressive Caucus PAC removed Poindexter from their endorsement lists, according to Politico. The two organizations represent opposite ends of the Democratic Party’s ideological spectrum, and both had previously backed his candidacy.

When Politico asked Poindexter earlier in the week about the endorsements, he said he was concentrating on setting up his congressional office. He also said he wanted to gain a better understanding of the political landscape before joining an ideological caucus.

Poindexter is a union ironworker and a former City Council member. His victory turned Ohio’s 7th Congressional District blue after a race against Miller, the Republican incumbent.

Miller had faced scrutiny over domestic abuse allegations involving his former wife, Emily Moreno. She is the daughter of Republican Sen. Bernie Moreno, and Miller has denied the allegations against him.

The DCCC had already placed Poindexter in its Red to Blue program in August. That designation provided his campaign with additional support during the competitive contest for the district.

Poindexter’s win formed part of the Democratic takeover of the House described in the election results. Democrats were estimated to hold 257 seats, compared with 172 for Republicans.

The allegations now confront both Poindexter and the campaign committee during the short period between his election and his planned arrival in Congress. The DCCC has said its outside investigators will conduct interviews and gather facts before the committee comments further.

Poindexter is scheduled to be sworn in on Jan. 3 as a member of the 120th Congress. Democrats are set to take control of the House at that time, while the investigation into his alleged conduct proceeds.