The mayor of Anchorage, Ethan Berkowitz, said Monday that he had engaged in an “inappropriate” relationship with a local news anchor, the latest development in a roiling political drama that began when the reporter claimed there were graphic personal photos of the mayor on an “underage girl’s website.”
The unsubstantiated claim had been posted to social media on Friday by the news anchor, Maria Athens, promising viewers an “exclusive” story set to air on upcoming newscasts. Mr. Berkowitz responded by calling the allegations “slanderous” and false, and Ms. Athens shot back by posting what she said was an image of the mayor’s bare backside, with a laughing emoji.
But as political leaders in Anchorage lined up to defend Mr. Berkowitz, the mayor came forward on Monday with an admission: He and Ms. Athens had previously engaged in a “consensual, inappropriate messaging relationship.”
“I’m embarrassed and ashamed for the hurt I’ve caused my family and our community,” said Mr. Berkowitz, a former candidate for governor and longtime leader in the state’s Democratic political circles. “I take responsibility for my actions.”
Mr. Berkowitz has continued to deny that he did anything illegal, as implied in Ms. Athens’s Facebook video. The Anchorage Police Department said it had worked with the F.B.I. to investigate the allegations about the mayor and “found no evidence of criminal conduct.”
Before Ms. Athens posted her video online, the mayor’s office said she had left a voice message for him. In a copy of that message provided by the office, Ms. Athens can be heard in a furious rant making anti-Semitic references and saying that she would be exposing the mayor as “a pedophile.”
“I’m going to get an Emmy, so you either turn yourself in, kill yourself, or do what you need to do,” Ms. Athens said, according to the audio clip. She then said she would personally kill him and his wife.
Ms. Athens, 41, is the main anchor for two outlets, KTBY and KYUR, which broadcast online as Your Alaska Link. Bill Fielder, the station owner, said the video Ms. Athens posted had not been approved. He has demanded that she remove references to the news outlets.
“We had no knowledge of it in advance of her posting it,” Mr. Fielder said.
Ms. Athens was arrested on Friday after a physical altercation with her boss at the station, according to local news reports, not long after her initial video was posted to Facebook. She was charged with misdemeanor assault, criminal mischief and disorderly conduct and released over the weekend on bail.
Mr. Fielder declined to discuss what led up to the arrest but said that Ms. Athens was no longer with the company, effective Monday.
Mr. Berkowitz, a former Alaska state representative who served eight years as minority leader, ran unsuccessfully for Congress in 2008 against longtime Representative Don Young and for governor in 2010. He was elected mayor in 2015.
“It takes time to rebuild trust and I hope you afford me the opportunity to do so,” Mr. Berkowitz said in his statement. “During the remaining months of my term, I will continue working on the important issues we face. Please consider my family’s privacy during this difficult time.”
The Anchorage Assembly, in a separate statement, said it had been informed on Monday of the “improper and distasteful actions taken by our mayor.”
It said that the authorities had found no evidence of illegal activity on the part of the mayor but noted his admission of a “consensual yet inappropriate” relationship with Ms. Athens.
“We are disappointed and disheartened by this news and send our heartfelt support to First Lady Dr. Mara Kimmel and the rest of the Mayor’s family, who we know are going through a very difficult time,” it said.