Two people have died and a man has been arrested
At around 8.15am, emergency services were called to an incident involving a lorry, a van and a car at junction 34 near Sheffield, just north of the Tinsley Viaduct.
A stretch of the M1 northbound between junctions 35 and 35 remains closed for investigations and is not expected to open until 6pm this evening (Friday).
Two men in the crash suffered fatal injuries and died at the scene.
A 39-year-old man from Hull was arrested on suspicion of causing death by dangerous driving and remains in custody.
A statement from South Yorkshire Police said the families of both men have been notified.
It said: "Officers would ask that the public refrain from posting speculation or potentially distressing content about the collision online. Further details about those involved will not be released at this time.
"Officers are keen to hear from anyone who may have witnessed the collision this morning, especially any motorists travelling along the M1 who may hold dash cam footage.
"Please call 101 quoting incident number 196 of 7 June."
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