Scher said initial reports from the port indicated that the lines keeping the ships in place somehow "parted" sometime before 7:30 p.m., and they began shifting away from their berth. Only one of the ships came in contact with the crane, he said.
"I was told that when the lines parted, and the ship began to shift away from the pier, the ramp was obviously down because the ship was being worked and the ramp made contact with one of our cranes," Scher said.
He said he did not know how extensively the crane was damaged.
Scher said no one was injured. It took about an hour for the ships to be brought back under control and retied to their berths, he said.