FILE - This Feb. 6, 2013 file photo released by Starpix shows TV personality Katie Couric at the premiere of "Makers: Women Who Make America" at Alice Tully Hall at Licoln Center in New York. New York City police said Thursday, Feb. 14, 2013, they had been called to Couric's Manhattan home several times recently because of 911 calls traced to a phone listed there. The 911 operator hears only static, but police are compelled to answer each call. The calls come on Tuesdays at 2 a.m., as Couric told an audience at her talk show's taping this week. Police say they are investigating whether something's wrong with her phone or if Couric is the victim of a high-tech prankster. (AP Photo/Starpix, Marion Curtis)

Katie Couric has become the focus of one strange investigation.

The NYPD is probing a series of mysterious 911 calls apparently originating from a phone line registered to Couric's late husband, Jay Monahan.

Monahan died in 1998 after a battle with colon cancer. But, according to the New York Daily News, his phone dials 911 every Tuesday around 2 a.m. There have been at least 10 instances of the calls since last month, according to the Daily News.

Couric relayed the bizarre story to her studio audience during a commercial break this week. She says she asked NYPD Commissioner Raymond Kelly to investigate the matter.

"So I called Ray Kelly, who I know just through the years seeing at different things. 'Ray, this is so weird but can you help me? I don’t know what to do,'" Couric told the audience, per an eyewitness account in the Daily News.

Whenever the mysterious calls are made, the police call back to check. In addition, a patrol car is sent to investigate. Couric told her audience that she always has a hard time getting back to sleep afterward.

Some experts believe "spoofing" is to blame for the calls. That's an illegal technique in which a hacker uses a device to hijack a phone line. Other celebrities who have fallen victim to the trick include Ashton Kutcher, Chris Brown, and Kim Kardashian.