- Police close both lanes of the M6 toll motorway near Birmingham, England
- Police are investigating claims made against a passenger, the bus company says
London (CNN) -- UK police have closed a major motorway near Birmingham, England, after an incident involving a passenger traveling on a bus from the northwestern town of Preston to London.
Staffordshire police described the unusual move to CNN: "There is major ongoing police-led incident on M6 toll motorway near Lichfield. Both lanes remained closed off."
A spokeswoman for Megabus confirmed that one of its vehicles was involved, with 48 people on board.
"We are assisting police with their inquiries into an allegation made against a passenger," the spokeswoman said.
Footage from the scene shows the bus pulled over on to the hard shoulder, with the passengers sitting on the tarmac.
The incident comes at a time of heightened security in the United Kingdom as it prepares for the opening of the London Olympic Games this month.
