Seven teenagers fell through ice on an off-limits pond in New York's Central Park but were rescued.

It happened Monday evening at the southern end of the park.

Police say the 15- and 16-year-olds were on the ice when it gave way. A nearby sign said, "Danger Thin Ice Keep Off."

Police and fire rescue units including divers responded. Two good Samaritans also helped pull the teens out of the freezing water.

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Bennett Jonas heard screams and ran into the water before rescue crews arrived.

“I grabbed a backpack. I didn't even know if he was attached to the backpack I had to go, I swam out, the water was under my head, I grabbed the backpack I could feel there was a body on it,” Jonas said.

One witness said she saw the boys posing for a picture when they went through the ice.

A police spokesman says the teens are expected to be OK.

The Associated Press contributed to this report.