The U.S. Attorney’s Office did not sign an arrest warrant for Rep. Cory Mills (R-Fla.) sent by the Metropolitan Police Department Friday over an alleged assault last week, according to multiple news reports.

Mills is being investigated over allegations that he assaulted a 27-year-old woman, who is not his wife, on Feb. 19 at an apartment building in Washington, D.C.

A spokesperson for the police department told Politico and NBC4 Washington Monday that the force sent an arrest warrant for Mills to the U.S. Attorney’s office on Friday, adding that the office never signed the document.

NBC4 Washington said the case was referred back to the department for further investigation, adding that the U.S. Attorney’s office declined to comment, citing its practice of not weighing in on uncharged cases.

The Metropolitan Police Department has now also launched its own internal probe into its handling of the matter, D.C. Mayor Muriel Bowser confirmed Friday.

Mills, who won reelection in November, is not facing any charges in connection to the incident and has denied wrongdoing.

“Both myself and the other individual said that what they’re claiming took place never took place and that’s been reported multiple times,” Mills told Politico in a Monday interview. “That’s why the prosecutor, [when] MPD tried to even push it forward, denied prosecution or any follow up.”

In a statement obtained by The New York Times last week, the unnamed woman attributed her decision to call the authorities to the scene last week to sleep deprivation and jet lag following a 14-hour flight, among other factors.

“Upon their arrival, [officers] noticed some bruising and marks on my arms, which I explained were the result of medical conditions like eczema and activities from my recent trip to Dubai,” her statement reads. “While the personal matter in question was emotionally charged, there was no physical altercation.”

NBC4 Washington has obtained three police reports with varying degrees of detail on the alleged incident, the first of which allegedly says that “Subject 1,” which police have since confirmed is Mills, ordered the woman to lie about her bruises.

“Eventually, Subject 1 made contact with police and admitted that the situation escalated from verbal to physical, but it was severe enough to create bruising,” the report added, according to the network.

But when police informed the woman that the incident would result in Mills’ arrest, she withdrew some of her statements, including on the origin of the bruises, the report says.

The subsequent two reports the outlet obtained were scarce in terms of details of the alleged incident.

Mills has previously said he would run for the Senate seat vacated by now Secretary of State Marco Rubio next year.

Need help? In the U.S., call 1-800-799-SAFE (7233) for the National Domestic Violence Hotline.