A major police operation which saw armed officers close a motorway and surround a London-bound coach is "not being treated as terror-related incident", detectives have said.
The M6 toll road near Lichfield was shut in both directions after allegations were made against one of the 48 passengers on board the Megabus coach from Preston to the capital Thursday morning.
The single-decker coach left the scene, escorted by a number of police vehicles, shortly after 12.35pm.
A spokesman for Staffordshire Police said: "This is not being treated as a terror-related incident."
A spokeswoman for Megabus, which is operated by Stagecoach, said all the passengers were safe and well.
"We are assisting police with their inquiries into an allegation made against a passenger who was travelling on the 05.10 Preston to London service," she said.
"There were 48 people booked to travel on board the service, which was due to arrive at Victoria Coach Station in London at 10.55am.
"The service is stopped at the M6 toll plaza.
"Police have confirmed that all passengers are safe and well and they have been transferred to a substitute vehicle.
"We are making arrangements to provide onward travel for passengers as soon as we receive clearance from the police."