A spokeswoman for Mayor Joseph A. Curtatone today told The Somerville News that Stan Koty has not resigned as the city’s commissoner of public works and that Frank Santangelo has not been named as his replacement.

The office has received some phones calls about Koty’s resignation, but is simply a rumor, said Lucy A. Warsh, the mayor’s press secretary.

Curtatone out of the city on a trip to Israel sponsored by the U.S. Conference of Mayors, but he has called to check in three times this morning, she said.