TV host Katie Couric has lost sleep lately, because of a series of mysterious early morning 911 calls made from a home phone registered to her deceased husband, police told The Daily News.

Every Tuesday at 2 a.m., a landline belonging to Couric's late husband, Jay Monahan, dials 911 -- and a patrol officer near her Park Avenue home has been forced to respond. There have been at least 10 calls since last month, a police source told The Daily News.

Couric told her studio audience Tuesday about the calls during a break at the filming of her daytime talk show, Katie, The Daily News reported. Her concerns, she told them, prompted her to call Police Commissioner Raymond Kelly.

"So I called Ray Kelly, who I know just through the years seeing at different things," she said to the audience, according to The Daily News. "'Ray, this is so weird, but can you help me? I don't know what to do.'"

When Couric spoke to Kelly, someone close to Couric told The Daily News, the commissioner directed her to a colleague who would investigate the situation.

The taping of Couric's show that day was delayed, and a tired Couric apologized to the audience, according to The Daily News.

During a show commercial break, Couric told the audience that she was awakened a by disturbing call, when the phone would apparently call 911, sending police to her apartment. Then, Couric would receive a call back to her apartment with an emergency operator on the line.

She compared the incident to a SWAT call -- prank calls that sent Los Angeles swat teams to the homes of Charlie Sheen, Ashton Kutcher, Tom Cruise and Charlie Sheen. But in Couric's case, according to The Daily News, only a single cop car arrives.

In most cases, this happens when Couric is not home. Police are investigating whether someone is using a device to hijack Couric's phone and call 911 -- an illegal trick known as "spoofing" -- or if it's just a phone malfunction.

"The matter is under investigation. We're trying to determine if it's a malfunction or not," a police source told The Daily News. "Is there a problem with the line or is it someone manipulating the line in some fashion, spoofing, or something of that nature?"