A man armed with an assault rifle walked out of the woods in Wisconsin and fired into a group of young people gathered at a river to go swimming, killing three teens and wounding a 20-year-old, local media reported on Friday.
Authorities had a suspect in custody after launching a massive manhunt along the Wisconsin-Michigan state line for a man between 30 and 50 years old wearing camouflage clothing, local television station WBAY reported online.
The victims were shot yesterday afternoon while they gathered with a group of a nine young adults near a railroad bridge located on the Menominee River, which forms the Wisconsin-Michigan state border and is near the city of Niagara, local media said.
The victims were 17, 18 and 19 years old. A 20-year-old man who suffered minor injuries.
More than 100 law enforcement officers from a dozen local and state agencies and airplanes with sensors that can detect body heat were deployed to find the killer, WBAY said.
Authorities also set up roadblocks and evacuated about 30 residents from the area.