"Police are continuing to question a man on suspicion of making a bomb hoax following claims which led to the Dartford Crossing being closed in both directions and severe delays on the M25.
Kent Police said the 27-year-old foreign national had made threats of a suspicious device on board the coach he had been travelling on before making further threats about an explosive device on another coach.
The incident led to motorists being caught in nine-mile long tailbacks after both the QE2 Bridge and Dartford Tunnels were closed for almost seven hours during rush-hour traffic on Friday night, while traffic was also stopped from using the A20 at Dover..."
http://uk.news.yahoo.com/m25-crossing-reopens-alert-052029667.html#gDSGf7d