Overview
- Police were called at about 11:30am to a collision on the southbound carriageway near Exeter between Junctions 28 and 29.
- The southbound stretch remains shut, and northbound traffic that was briefly held to allow an air ambulance to land has since been released.
- At least two people are believed to be injured, with ambulance and fire crews attending alongside police.
- National Highways reports long delays and has issued a signed diversion via the A373, B3181 and Cumberland Way to rejoin at Junction 30.
- Officials warn of significant queues and have not provided an estimate for reopening, and reports differ on whether two or multiple vehicles were involved.