Detroit police say a bomb threat has led authorities to close one of the busiest bridge-crossings between the U.S. and Canada, just four days after a similar threat closed a nearby international commuter tunnel.
Police spokeswoman Sgt. Eren Stephens says a call came in to authorities on the U.S. side of the Ambassador Bridge "pertaining to a bomb on the bridge" around 7:20 p.m. Monday. The bridge connects Detroit to Windsor, Ontario.
Stephens says the call prompted authorities in both cities to halt truck and car traffic across the bridge. So far, authorities haven't reported finding a bomb.
On Thursday, a bomb threat was phoned in to Windsor authorities that lead to a four-hour closing of the Detroit-Windsor Tunnel, the other crossing between the border cities. No bomb was found.