The FBI has opened a federal criminal investigation into the March 26 bridge collapse in Maryland, the Washington Post reported, citing two US officials familiar with the matter, Reuters reports.
The investigation will focus, at least in part, on the cargo ship Daly and whether its crew left the port of Baltimore knowing the ship had serious problems with its systems, according to the Washington Post.
FBI representatives could not immediately be reached for comment on the report.
The head of the US National Transportation Safety Board separately told Congress last week that he had interviewed key personnel on the cargo ship as part of the accident investigation.
Work is underway to clear the wreckage and restore traffic through the mid-Atlantic state's shipping channel after a huge container ship lost power and crashed into a support pole last month, sending the bridge crashing into the Patapsco River and killing six bridge workers.
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