A CRASH involving three cars and a heavy goods vehicle closed both directions of the M1 earlier this morning.
Police were called at around 9:15am and were forced to closed a section of the motorway after one of the vehicles caught fire.
However, firefighters are said to have quickly put out the blaze and there were no injuries.
One northbound lane remains closed between J4 A41 Edgware and J5 A41 Watford, and there are reports of queueing traffic.
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