NEW YORK (1010 WINS) -- FDNY firefighters rescued two window washers dangling from collapsed scaffolding on Roosevelt Island on Wednesday.

The rescue team retrieved the men around 11:30 p.m. on Main Street near Roosevelt Island Library.

An onlooker captured video of the rescue and streamed it to the Citizen App.

Two Construction Workers Rescued From Scaffolding @CitizenApp

Firefighters used a truck ladder to reach the workers and then secured them with ropes.

They then pulled the workers into the building through a window.

A preliminary investigation suggested a malfunctioning motor may have caused one side of the scaffolding to rise faster than the other, causing the whole platform to collapse, but a more thorough investigation is ongoing, according to ABC 7.

No one was injured by the incident.