A father and his 4-year-old son died after falling through ice into a lake in Michigan on Monday, police said.
Dive teams were on scene "relatively quickly" at Alderman Lake about 40 miles northwest of Detroit, the Oakland County Sheriff's Department said. The pair died later at an area hospital, NBC station WDIV reported.
"Such a tragedy," the sheriff's department said in an update. "Please, please, please presume ice is unsafe. Our weather has been such that predictable hard frozen ice is not present."
"We lost a young father and a 4-year-old who went through the ice today and even with our dive team in the water relatively quickly they could not be saved," it said.
The pair had been ice fishing on the lake when they fell into water that was between 8 and 12 feet deep, WDIV reported.
It identified the victims as David Michael Lyons, 30, and his son, Jackson.
Highland Township Assistant Fire Chief Richard Cole told the Detroit Free Press that both were wearing snowmobile suits, which become heavier in water.