Investigators boarded the cargo ship Dali that crashed into a major bridge causing it to collapse in Baltimore, Maryland, on Tuesday.

Footage shows officers using drones to inspect the horror wreckage of the Francis Scott Key Bridge on March 27.

The Dali vessel reportedly lost power before ramming into a bridge support, plunging the structure into the river as it fell apart within seconds early morning on March 26.

The ship's pilot issued a 'mayday call' minutes before the collision, allowing Maryland transportation officers to stop oncoming traffic onto the bridge.

Divers on Wednesday have recovered the bodies of two of six missing construction crew who are presumed dead.

Authorities fear the loss of the bridge could cost massive financial losses as the collapse has shuttered one of the busiest ports in the United States.