NEW YORK (AP) — Katie Couric is losing sleep over some odd 9-1-1 calls.

New York City police said Thursday they had been called to Couric’s Manhattan home several times recently because of 9-1-1 calls traced to a phone listed there. The 9-1-1 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. Couric called New York City Police Commissioner Ray Kelly to ask advice on what to do, and is awaiting the results of the investigation.

The calls were first reported in a New York Daily News story headlined “Katie’s 9-1-1 Hell.”