The body of a teenage boy was found Tuesday in the partially frozen New Jersey lake where he and another teen are believed to have fallen through the ice, authorities said.

The other boy has not been found. The search was suspended in the evening and was set to resume Wednesday morning.

Police began searching for the boys after several 911 calls came in reporting screams for help coming from the lake in Mount Olive Township shortly before 6:30 p.m. Tuesday.

The search in the frigid water changed Tuesday morning to a recovery effort, officials said.

One of the 911 callers, William Hardy, lives across the lake with a friend and told NBCNewYork.com he heard two cries and went to the lake to investigate in the dark.

"We heard some individuals calling for help, saying, 'Please help us. Please save us, someone help,'" said Hardy.

Hardy ventured onto the ice to locate the voices but could not safely get far enough to reach them.

"I took the flashlight and walked out about 800 feet," he said. "They're still another 100 feet in front of me, the ice is cracking. I can see a cell phone, I can still hear them. They're still talking to me and then the firefighters came."

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On Tuesday morning, the father of one 15-year-old boy believed to be among the two missing returned to the search scene at Budd Lake.

The father told NBCNewYork.com that his son told him by phone Monday afternoon that he planned to go ride his bike on the lake with a friend, which is something the boy had done before. When he heard helicopters and saw the news reports, the father rushed down to the lake to speak with investigators -- but they had nothing concrete to tell him. So he returned Tuesday to wait.

He told NBCNewYork.com he didn't know the other boy who was believed to be at the lake with his son.