The lifeboat was about 25-30 yards away and was being towed by the Bainbridge at the time, he said. The pirates had agreed to the tow to move the powerless lifeboat out of rough water.
A fourth pirate surrendered after boarding the Bainbridge earlier in the day and could face life in a U.S. prison. He had been seeking medical attention for a wound to his hand and was negotiating with U.S. officials on conditions for Phillips' release, military officials said.
