Officers from the Central Motorway Police Group, covering West Midlands Police and the Staffordshire Police force, attended the scene. National Highways warned motorists that delays of half an hour were to be expected.
They added that two miles of congestion awaited motorists approaching the junctions.
They tweeted: “Traffic is currently stopped on the #M6 southbound between J8 (#M5) and J7 (#Great Barr) due to a @CMPG led incident.
“There is currently 2 miles of congestion on approach causing delays of 30 mins above normal travel time.”
National Highways then warned motorists of further delays to travel via the southbound junctions.
The congestion had increased to four miles, they cautioned.
This would take time to clear as police reopened the scene.
They posted in an update that the carriageway had now reopened to all traffic.
They wrote: All lanes are now open on the #M6 southbound between J8 (#M5) and J7 (#Great Barr) following an earlier @CMPG led incident.
“There are 4 miles of congestion following this incident so please allow time for these delays to clear.”
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