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M6 Toll motorway: Megabus coach sparks security alert

5 July 2012 Last updated at 13:55 BST

A passenger on a Megabus coach service has prompted a security alert on the M6 Toll motorway.

Armed police responded when the 0510 Megabus service from Preston to London stopped on the M6.

A police source told BBC Radio WM that a passenger was seen pouring a liquid into a box, which then started smoking.

The 48 passengers were led off the coach and forced to sit apart in a cordon on the opposite carriageway.

About four hours after armed officers arrived, police confirmed the scene as safe, and said no-one was being treated as suspicious.

Jeremy Cooke reports.