Man seriously injured in ‘M4 attack’ that closed motorway
Emergency services, including an air ambulance were called to the motorway at around 2.30pm, between junction 17 at Chippenham and junction 16 at Swindon. Police say an assault took place inside a grey Vauxhall Astra and a man in his 30s suffered serious facial injuries. He was located in the passenger seat of the Astra on the hard shoulder of the westbound carriageway.
A 40-year-old man, who is believed to be known to the victim, was found nearby with minor facial injuries. He was arrested on suspicion of grievous bodily harm and drink driving. 
He was taken to hospital for treatment to his injuries and has since been taken into custody for questioning. The victim was rushed to hospital by land ambulance and has been receiving treatment for his injuries, which are not thought to be life changing. During this incident, the motorway was closed while police carried out enquiries.
Officers investigating the alleged assault are now appealing for witnesses or anyone who may have captured anything on their dashcam. A spokesperson for the force said: "We are appealing for witnesses and dash cam footage to yesterday's (January 27) incident on the M4, in which a man suffered serious injuries. "We are keen to hear from anyone who witnessed or has dash cam footage of the altercation or the Vauxhall Astra on the M4 to contact us.
"If you can help, please contact us on 101 quoting reference 54260010786." Suggested reading The closure of the motorway caused major disruption, with hundreds of cars stuck in standstill queues for around two hours.
One motorist said: "I've been sat here for 40 minutes and I'm about two football pitches from it. "I can see the police and the ambulances everywhere. The westbound lane hasn't moved in nearly an hour."
A truck driver added: "I've been stuck here for 50 minutes and so far haven't moved an inch in my truck." Significant emergency resources were deployed to the scene. A spokesperson for the South Western Ambulance Service added: "We were called at 2.15pm on Tuesday, January 27, to an incident near Chippenham.
"We sent one double-crewed land ambulance, an air ambulance, and an operations officer to the scene."