13 people injured in 'serious' multi-vehicle crash on Maryland's Chesapeake Bay Bridge: Police

More than a dozen people were injured in a "serious" multi-vehicle crash that occurred on the U.S.-50 Bay Bridge in Maryland Saturday morning, authorities said.

The incident occurred around 8 a.m. ET on the westbound span of the bridge, which crosses the Chesapeake Bay.

Investigators believe 23 vehicles were involved in a "chain-reaction crash" on the westbound span, the Maryland Transportation Authority Police said.

Additionally, approximately 20 vehicles were involved in a series of "secondary crashes," police said.

Thirteen people were transported to local hospitals, including two with serious injuries, police said. None of the injuries are believed to be life-threatening.

The westbound span of the bridge was closed for several hours following the crash, as tow operators were working to clear vehicles. All lanes reopened by 2 p.m. ET, the Maryland Transportation Authority said.