Kent Police was called at 1.49pm on Thursday 25 April regarding a collision involving two cars on the eastbound carriageway of the M26 between junctions 1 and 2A.
Officers and the South East Coast Ambulance Service are currently at the scene where a person is being treated for injuries.
Fire crews are also in attendance to free a person who is trapped in one of the cars.
The eastbound carriageway has been closed while emergency services are dealing with the incident.
The westbound carriageway will be briefly closed to allow the air ambulance to land.
Drivers may wish to consider alternative route