The incident happened Sunday just before 5 p.m. at Lake Musconetcong.
Crews arrived to find two to three people on the ice pointing to where another person had fallen through, about 300 yards away.
That victim had fallen through the ice while on his motorcycle.
While crews were making their way on to the lake, two of those bystanders also fell through the ice.
Netcong crews successfully pulled all three victims from the water with ropes and ice rescue equipment.
Two of the victims refused medical assistance and the third victim was taken to nearby hospital.
Their condition was not yet known.
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