A ceiling partially collapsed at the Stamford train station Wednesday.

A woman was taken to the hospital for minor injuries, according to officials. It is not clear how she was injured, as officials say no one was injured directly by falling debris.

Officials say it happened just after 5 p.m. in a tunnel stairwell.

Connecticut Department of Transportation say the tunnel is currently closed pending an investigation.

"There are ways for the public to get back and forth without using the tunnel and the train station staff is there to guide them to their destinations. The station platforms remain accessible throughout the station. At this time, we do not have an estimate as to when the tunnel will reopen," Connecticut Department of Transportation said in a statement.

There is no word yet on what caused the collapse.