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Part of the M2 was closed for several hours following a crash involving a police car.
The collision has happened on the London bound carriageway between J3 A229 (Chatham / Rochester) and J2 Medway Bridge (Strood / Rochester).
Dash cam footage from the scene shows a police car with a damaged bonnet.
Witnesses have reported three ambulances and three police cars heading to the scene.
A Kent Police spokesperson said: "We were called at 5.38pm to a collision involving four vehicles.
"Minor injuries were reported."
The road was reopened shortly after 8.30pm.
Listen to kmfm for travel updates.