An investigation has been launched after a construction scaffold collapsed onto a busy Manhattan sidewalk during Friday's morning rush.

It happened around 8 a.m. on 14th Street near Seventh Avenue in Chelsea.

No one was hurt.

"The doorman called up and said we need to evacuate. He didn't say why. We just looked outside and saw all of the fire trucks and ambulances, so I came down and saw the scaffolding had collapsed," said one building resident.

"I just heard a loud bang and I came running out and all of a sudden before I know it there were sirens and police cars coming down the block," said another.

The Department of Buildings is investigating the incident.