Alaska ? A fishing boat sank off Alaska’s Aleutian Islands on Sunday, leaving four crew members including the captain dead and another missing, the Coast Guard said.

Forty-two of the 47 crew members on board the Seattle-based Alaska Ranger were rescued, but the search continued for the missing person, said Chief Petty Officer Barry Lane.

The 184-foot vessel started taking on water shortly before 3 a.m. after losing control of its rudder 120 miles west of Dutch Harbor, which is on Unalaska Island.

In a statement, the ship’s owner, the Fishing Company of Alaska, said it did “not have sufficient information to determine why the vessel foundered.”

Seas with up to 8-foot waves and 25-knot winds were reported at the time the ship sank, Lane said. The Coast Guard was investigating the cause of the sinking, he said.