Officials say seven construction workers were injured, two of them critically, when scaffolding on which they were standing collapsed in Hackensack.

(katifcam, ThinkStock)

Police say the men fell about 45 feet in the 3:30 p.m. accident on Thursday.

Hackensack University Medical Center spokeswoman Nancy Radwin said that seven patients were being treated that the hospital. The extent of their injuries wasn't immediately known.

The workers were on the scaffolding held up by ladders on the side of a three-story apartment building where they were adding a new roof.

Investigators from the Bergen County Sheriff's Office and federal Occupational Safety and Health Administration were investigating.

© 2015 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. Learn more about our Privacy Policy and Terms of Use.