Mexican sailors were seen dangling from a navy training vessel's main mast moments after the ship smashed into the Brooklyn Bridge.

The sailors had been standing atop the Cuauhtémoc's 150-foot masts in the lead up to the ship striking the iconic structure on Saturday as part of a traditional greeting.

The massive Navy vessel, reportedly carrying nearly 300 passengers, hit the iconic New York City bridge, triggering a colossal rescue response and leaving two dead and dozens more severely injured.

In multiple eyewitness videos, the towering masts are seen snapping and partially collapsing as they crash into the bridge's deck. Sailors perched high above are thrown into chaos, with some seen clinging to the shattered beams high up in the air.

Bystanders Sydney Neidell and Lily Katz told the Associated Press they were sitting outside watching the sunset when they saw the vessel strike the bridge and one of its masts snap.