Two firefighters were injured at the former Deutsche Bank building when a large tool was mistakenly launched out of the building, causing a shed to collapse on to the street, fire department officials said.

The firefighters, who were not identified, were standing underneath the shed when it came down and are in stable condition at St. Vincent’s Hospital, officials said.

A large motorized tool used to transport heavy materials was launched out of a door on the 23rd floor and landed on the shed after a man working at the site lost control of it, officials said.

One of the firefighters was bleeding from his head and the other appeared to be shaking when paramedics rushed them to ambulances, a maintenance worker who is employed next door, Oscar Acosta, said. Both firefighters were wearing neck braces, he said.

It is unclear what the firemen were doing at the site, fire officials said.

At least one other bystander was reportedly injured in the collapse, but the extent and number of injuries are still unclear.

On Saturday, two firefighters, Richard Beddia and Joseph Graffagnino, were killed in a blaze at the building at 130 Liberty St. after becoming trapped on the 14th floor. The cause is under investigation.

The building was condemned after it was contaminated by asbestos and other toxins during the collapse of the World Trade Center towers on September 11, 2001.