Crews have rescued two people and are searching for others this morning after the Francis Scott Key Bridge in Baltimore collapsed overnight when it was struck by a large cargo ship, according to USA Today.

Several vehicles were on the bridge around 1:30 a.m. Tuesday when it collapsed into the Patapsco River, James Wallace, chief of the Baltimore City Fire Department, said at a news conference.

One of the rescued individuals was unharmed while the other is in “very serious condition,” Wallace said.

Officials believe that at least seven people were in the water.

“This is an unthinkable tragedy,” Baltimore Mayor Brandon Scott said at a news conference.

The Port of Baltimore has come to a halt, The New York Times reported.

It ranks 20th in the nation for total tons of cargo, according to the Bureau of Transportation Statistics.

Check back later as this is a breaking news story.

This article originally appeared on York Daily Record: YDR photos: Francis Scott Key bridge collapses