One person was killed and three are missing after part of an under-construction hotel collapsed in New Orleans early Saturday.

Eyewitness video shows construction workers running for their lives as the upper floors of the Hard Rock Hotel New Orleans crumbled and a crane collapsed on Rampart Street near Canal Street, on the edge of the French Quarter. A large steel beam, hoisted up by one of the cranes, swayed in the air above the portion of the building that collapsed, WWL-TV reported.

A second piece of the building fell around 10:45 a.m.

Multiple injuries were also reported, according to NOLA.com.

It was not immediately clear what caused the collapse.

Construction site collapse at Hard Rock Hotel New Orleans
AP