MESA, Ariz. - A cable news program was temporarily replaced with hard-core pornography, shocking viewers who had been watching a health show featuring former NBC News anchor Tom Brokaw.

The incident Monday night on KPPX-TV was “an act of human sabotage” at the Phoenix-area station, said ION Television, which operates the station.

“We have launched a rigorous investigation, and any implicated employees will face strict disciplinary action and termination,” ION Media Networks spokeswoman Leslie Monreal said in a statement.

Brenda Schodt, of Chandler, said she was shocked to look up and see graphic sex acts on her television screen.

“Maybe five or 10 minutes into the show there was no volume,” Schodt said. “I thought it was the TV, but when I looked up, there were these images.”

ION Television, based in West Palm Beach, Fla., declined to say whether the pornography aired beyond the Phoenix market.

Any word on what the movie was?

They didn't say, but maybe Willie had something to do with it since it was in AZ.

It would be awesome if it were GF 5 Aurora Snow.