The M1 near Redbourn was closed after a car crash in the early hours of this morning.
Emergency services were called to a collision at about 1.30am between junction 10 and nine on the southbound carriageway of the motorway.
Firefighters from Redbourn and Harpenden, alongside one crew from the Bedfordshire Fire and Rescue Service, rushed to the incident.
Highways England closed the road and the East of England Ambulance Service sent a Hazardous Area Response Team, six ambulances and two ambulance officers to care for multiple casualties.
Five patients were taken to Luton and Dunstable Hospital and two patients were taken to Watford General Hospital for further treatment.
All the M1 lanes were reported to be back open by 3.15am.
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