Sri Lanka, March 28 -- The bodies of two construction workers were found in the cold waters of Baltimore harbor Wednesday, trapped in their red pick-up truck after a giant cargo ship slammed into the bridge they had been filling potholes on, causing a thunderous collapse.

Maryland police announced the grim discovery at a press conference, adding that sonar shows what they believe are more vehicles trapped within the concrete and twisted steel debris of the Francis Scott Key Bridge.

Six of the eight-man construction crew are believed to have been killed, with four bodies yet to be found.

Warning that it was not safe for divers to try to penetrate the wreckage, police told a press conference that they were shifting to a salvage operation...