Unalaska, AK – Four people are dead and a fifth is missing after the crew of the trawler Alaska Ranger was forced to abandon ship early this morning.

As of 1:30 p.m., the Coast Guard was unable to confirm whether the 184-foot ship, which is owned by the Fishing Company of Alaska, was still afloat, and few details are available on the cause of the incident. According to the Coast Guard, the ship lost control of its rudder and began taking on water at about 2:50 a.m. this morning, 120 miles west of Unalaska. The identities of the dead crew members have not been released.

The Coast Guard cutter Munro is on the scene, as are two helicopters and a C130 aircraft. The Munro and the Alaska Ranger's sister ship, the Alaska Warrior, are expected to return to Dutch Harbor with the surviving members of the 47-person crew late tonight.

Today's incident is the second involving an FCA boat in the Bering Sea this winter. In December, the trawler Alaska Patriot was damaged by an engine room fire while it was docked near Dutch Harbor.