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Picture: AP

Katie Couric is losing sleep over some odd 911 calls.

New York City police said on Thursday they had been called to the US talk show host'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 2am, 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.