Probe of Philly Duck Boat Crash Turns to Tug Crew

Federal investigators have been spending the weekend interviewing crew members of the tugboat towing a barge that struck an amphibious tourist boat, plunging three dozen people into a Philadelphia river in which two of them drowned.

Keith Holloway, spokesman for the National Transportation Safety Board, says the 10-member team wants to know what the five crew members saw and heard during Wednesday's crash. Officials say one thing they want to know is whether the crew heard distress calls that the duck boat crew says were made.

Holloway said Sunday that investigators are also looking over the duck boat, which was pulled from the river Friday along with the bodies of two Hungarian students, for impact marks and signs of mechanical failure.

A memorial was held Saturday for the two victims. Thirty-three other passengers and two crew members were rescued.