The M1 has been partially closed following a huge crash that has caused huge traffic tailbacks.
The busy motorway has been closed across four junctions – between Junction 4 near Elstree and Junction 1 near Wembley.
According to traffic monitoring system Inrix, the crash happened between Junction 2 A1 Watford Way (Barnet By-Pass) Fiveways Corner and Junction 1 A406 North Circular (Staples Corner).
Metropolitan Police officers have rushed to the scene, but it remains unclear how serious the crash is.
Motorists are being diverted to avoid the crash site.
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