ASHLAND, Wis. — Autopsies indicate hypothermia and possibly drowning apparently caused the deaths of four Wisconsin family members kayaking on Lake Superior.

Ashland County Sheriff Mick Brennan said results indicate that 39-year-old Eric Fryman died of hypothermia while his three children, ages 3 to 9, died of hypothermia and possibly drowning.

The family from Loyal, Wisconsin, set out from Madeline Island in an open-top tandem kayak last Thursday for a 4-mile (6-kilometer) paddle across open water to Michigan Island. But their 13½-foot (4-meter) kayak capsized after the wind picked up.

Eric Fryman and his three children — 9-year-old Kyra, 5-year-old Annaliese and 3-year-old Jansen — were found dead in the frigid water. The children’s mother, 29-year-old Cari Mews-Fryman, survived.

All of them were wearing life jackets.