Nine people - including a one-year-old boy and a six-year-old girl - were injured in a multi-car crash on the motorway near Lancaster.
Emergency services including the air ambulance were called at 10.30am on Monday to the serious collision beween Junction 33 and Forton services on the M6 southbound.
Police said a BMW 4 Series collided with a Honda CR-V causing both cars to hit the central reservation barrier.
The Honda then collided with a Nissan X-Trail and the BMW collided with a Honda HR-V.
Nine people were injured and eight of those remain in hospital, five with serious injuries. None of the injuries are thought to be life threatening.
The driver and front seat passenger of the BMW, a man and woman both in their 30s, and a six-year-old girl who was a rear seat passenger suffered serious injuries.
A one-year-old boy who was also a rear seat passenger suffered less serious injuries.
The driver and front seat passenger from the Honda CR-V, a man and woman in their 80s, suffered relatively minor injuries.
The driver of the Nissan X-Trial, a woman in her 30s, suffered minor injuries.
The driver and front seat passenger of the Honda HR-V, a man and woman in their 60s, suffered serious injuries.
The motorway was shut for a number of hours causing major disruption and delays to the surrounding road network.
Following repairs the road is now fully open.
Sgt Anthony Beckett, of the Road Policing Unit, said: “This collision resulted in a number of people suffering some very serious injuries and resulted in some major disruption and delays for many motorists and I would like to thank those people for their understanding and patience while we dealt with a very difficult scene.
"I do appreciate that the closure of the motorway for such a long time is frustrating, but we worked hard to make sure that we and our partners were able to deal with the injured parties and to carry out our collision investigation work while aiming to reopen the road as soon as we were able.
“I would appeal to anyone who saw the collision itself, or the BMW driving prior to the collision, or who has any dashcam footage, to get in touch.”
You can call police on 101 quoting log 0430 of July 14th or you can email the Serious Collision Investigation Unit at SCIU@lancashire.police.uk
Three fire engines were called to the incident.
A Lancashire Fire and Rescue Service spokesperson said: "At 10:31 hours on 14th July 2025, three fire engines from Silverdale, Lancaster, and Bolton-le-Sands, along with two drones and several officers, were called to the M6 motorway southbound between junctions 34 and 33 following reports of a road traffic collision involving multiple vehicles.
"On arrival, fire crews dealt with a multiple vehicle collision involving several casualties.
"Casualties were left in the care of the ambulance service."
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