Authorities were frantically searching Lake Superior for three boaters Monday, including a 9-year-old and his father, who didn’t return from a fishing trip.

Family members called police when the trio who departed from Michigan’s Upper Peninsula didn’t return for a fish fry Saturday. According to Upper Michigan Source, one man was identified as Keith Karvonen. The other two identities weren’t released.

Cmdr. Carolyn Moberley of the U.S. Coast Guard said Sunday evening that the search would go on overnight. There was still no sign of the boat early Monday.

State police Sgt. Jamie Patterson said the lake may have been a bit choppy Saturday but the weather was "pretty decent."

"We're concentrating our search right now from the Gay area, all the way down to Baraga, and over towards the Huron Islands," Marquette Coast Guard’s Patrick Brown said. "But if you have any information, from any area, then definitely call."

The boy and his father are from Ishpeming. They were with a 61-year-old man from Atlantic Mine.

The search involves state police, the U.S. and Canadian coast guards and local police.

The Associated Press contributed to this report.