The Ambassador Bridge, a busyinternational border crossing linking Windsor, Ontario, withDetroit, was closed for five hours on Monday following a bombthreat.
But investigators using bomb-sniffing dogs found nothingsuspicious and the span reopened to traffic early Tuesdaymorning, authorities on both sides of the border said.
"No bomb or device was detected on the bridge," Detroit'semergency management agency said in a statement. It called theincident "closed."
Police on the Canadian side began removing barriers andallowing vehicles back onto the 7,500-foot (2,286-meter) bridgeshortly after 1 a.m. EDT (0500 GMT), a dispatcher with theWindsor Police Department said.
The shutdown of the busy crossing came less than a weekafter the Detroit Windsor Tunnel, a nearby cross-border route,was closed by a bomb hoax.