All lanes are currently closed on a Doncaster stretch of motorway due to a road traffic collision that took place earlier this afternoon.
Motorists are being advised that all lanes between junction 3 and junction 2 southbound of the M18, near Doncaster, are closed as a result of the accident.
There are also long delays from junction 4.
A Highways England spokesman said on Twitter: "#M18 SB J3 + J2 nr #Doncaster. All lanes currently stopped due to a collision.
"Long delays from J4. Pls allow extra journey time."
South Yorkshire Police have been contacted for more information.