A masked prowler dubbed "Spider-Man" by his Manhattan victims is using fire escapes to burglarize one building after another.
Police have put up flyers warning residents in part of Washington Heights to lock up their windows.
Ramon Castillo, a building superintendent, said his apartment on Bennet Ave. was broken into two weeks ago.
"Yes, he's Spider-Man," said Castillo, who believes the thief has hit at least 10 buildings in the neighborhood.
In addition to using fire escapes, the burglar is boosting himself onto air-conditioning units to climb through 20-inch spaces at the top of windows.
"He must be a very thin guy, too," said Gabe Gruboy, who lives two floors above Castillo and had his apartment broken into the same night.
Jewelry and pricey Apple products were stolen in both burglaries.
In April, police were searching for a burglar who used fire escapes to break into three different buildings on 180th Street in four hours, and another police flyer in the neighborhood warns of a burglar who used a fire escape to break into a Seaman Avenue building.
Police have not confirmed whether those burglaries are related.