NEW YORK (AP) — NBC News fired longtime "Today" show host Matt Lauer on Wednesday for "inappropriate sexual behavior," making him the second morning television show personality to lose his job because of sexual misconduct charges in a week.

Lauer's co-host Savannah Guthrie made the announcement at the top of Wednesday's "Today" show. Last week, CBS News fired Charlie Rose after complaints from several women who worked for him.

NBC news chief Andrew Lack said in a memo to the staff that NBC received a complaint about Lauer's behavior on Monday and determined it was a clear violation of company standards. NBC said the misconduct started when Lauer and a network employee were stationed at the Sochi Olympics in 2014 and continued beyond that assignment.

While it was the first complaint ever lodged against Lauer, Lack said, "we were also presented with reason to believe this may not have been an isolated incident."

Lauer, 59, has hosted "Today" for two decades. When paired with Katie Couric, "Today" was the longtime ratings leader and was highly lucrative for NBC. It now runs second in the ratings to ABC's "Good Morning America."

The longtime host had several notable moments involving New Orleans, including the following: 

  • In 2010, Lauer traveled to New Orleans to document the fifth anniversary of Hurricane Katrina. During that time he interviewed former New Orleans mayor Ray Nagin, current mayor Mitch Landrieu and then governor Bobby Jindal. Lauer also interviewed Laura Bush, the wife of George W. Bush, during which the pair discussed the former president's legacy. 
  • Also in 2010, Lauer took part in an interview with celebrity Sandra Bullock at Warren Easton Charter School. Bullock had spent time in New Orleans following Hurricane Katrina, and had recently adopted a baby from the area. 
  • Last April, Lauer interviewed Tulane medical student Peter Gold, who was attempting to help a woman who was being dragged down a street in 2015 when he was shot in the stomach. Lauer joined Gold as he watched footage of the shooting for the first time

Many "Today" show viewers took out their anger for the unsightly 2012 firing of co-host Ann Curry on Lauer, sending the show plunging in the ratings. But NBC stuck with Lauer and the show had steadied with his pairing with Guthrie. The show runs for four hours, with Lauer and Guthrie hosting the first two.

He joins a lengthening list of media figures felled by sexual misconduct charges this year. Besides Rose, they include Lauer's former NBC News colleague Mark Halperin, former Fox News prime-time host Bill O'Reilly and National Public Radio newsroom chief Michael Oreskes. The New York Times suspended White House correspondent Glenn Thrush last week.

Messages to Lauer and his agent were not immediately returned.

Lack, in his memo, said that "we are deeply saddened by this turn of events. But we will face it together as a news organization — and do it in as transparent a manner as we can." There were reports that, before the firing, some media organizations were looking into Lauer's behavior. The morning host is married with three children.

Guthrie co-hosted Wednesday's show with Hoda Kotb, who said both of them were awakened with the news Wednesday morning. Guthrie appeared to fight back tears as she called Lauer her friend who is beloved by many at NBC, and said she was "heartbroken for my colleague who came forward to tell her story and any other women who have their own stories to tell.

"We are grappling with a dilemma that so many people have faced these past few weeks," she said. "How do you reconcile your love for someone with the revelation that they have behaved badly? I don't know the answer to that. But I do know that this reckoning that so many organizations have been going through is important, it's long overdue and it must result in workplaces where all women, all people, feel safe and respected."

Two hours later, NBC's Megyn Kelly noted the anguish on the faces of her colleagues but said, "what we don't see is the pain on the faces of those who found the courage to come forward, and it is still a terrifying thing to do."

Kelly, who has written about being sexually harassed by former boss Roger Ailes at Fox News Channel, has covered the issue aggressively on the third hour of "Today," helping stabilize her hour of the program after it got off to a rocky start this fall.

On Twitter Wednesday, President Donald Trump said "Wow, Matt Lauer was just fired from NBC for 'inappropriate sexual behavior in the workplace.' But when will the top executives at NBC & Comcast be fired for putting out so much Fake News."

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Associated Press writer Patrick Mairs in Philadelphia contributed to this report.