Police and traffic officers clear debris from the carriageway
Two lanes are closed and there are long queues on the M1 after a crash involving a lorry and two cars occurred earlier today.
The incident happened on the northbound carriageway between junctions five (Watford) and six (St Albans).
Hertfordshire Constabulary said three vehicles were involved in the crash but added that no-one had been injured.
Police and traffic officers are currently on the scene clearing debris from the carriageway.
UPDATE 11:04am - The carriageway is now clear and all lanes have been reopened.
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