UPDATE: 11.02am
A spokeswoman for South Wales Fire and Rescue Service said three cars were involved in the collision and they were called at 10.46am.
Crews from Malpas and Duffryn attended and no-one was injured or trapped.
UPDATE: 10.56am
ONE lane is blocked and queueing traffic reported on the M4 eastbound between J28 at Tredegar Park and J27 at Highcross, because of an accident involving three vehicles.
Firefighters are at the scene.
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