Two lorry drivers have died in a serious collision that has closed the M1 southbound for several hours on Saturday.
The HGV drivers were both pronounced dead at the scene, Bedfordshire Police said.
A section of the M1 motorway was closed in both directions following the collision between two lorries at about 6.40am.
Highways England said the northbound and southbound carriageways between junction 12 at Flitwick and 13 near Milton Keynes were closed on Saturday morning.
The southbound carriageway remains closed until further notice.
Bedfordshire police are now appealing for witnesses to the crash and ask anyone with information to call 101 quoting Op Effervescence.
A Highways England spokeswoman said at 10am that the southbound carriageway was likely to be closed for "several hours".
"Police investigations are still taking place," the Highways England spokeswoman said.
"Police have also asked for the northbound carriageway to close while recovery takes place."
