An air ambulance has been called to the scene of a crash which has closed the M1 northbound near Luton.
The accident involving two cars and a lorry happened just after 7am between junctions 10 and 11.
There is congestion backing up to junction 7.
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Sunday forecast: Heavy rain is expected for a time with gusty winds, then clearing during the afternoon.
March in the Anglia region has been much drier and sunnier than normal although temperatures have been around average.
Breezy and rather cloudy overnight but mainly dry. On Sunday, becoming wet and windy for much of the morning after a dry start.