Police are appealing for witnesses after a collision led to a brick being thrown at a police car.
A white Nissan Juke and a motorcyclist were involved in an accident at the junction of Ingress Park Avenue and London Road in Greenhithe.
Following the collision the motorcyclist was reported to have left the scene, leaving the bike behind.
A short time later it was alleged that a group of six people, with three riding motorbikes and three on quad bikes, arrived and a brick was thrown at the white car.
The group were then seen to enter the A2 London-bound where they were alleged to have been driving on the hard shoulder and across four lanes of traffic.
After exiting at the Bean junction they headed towards Greenhithe and the B255 where they approached a parked police car, before throwing a brick at the back of the car and kicking off its wing mirror.
The officer was outside the vehicle trying to clear up the debris when the group threw another brick at the car. The officer was not injured.
It happened at around 7.15pm on Friday, June 22.
Police would like to hear from anyone with information about the incident and also motorists with dashcam footage.
Anyone with CCTV is also asked to get in touch via the Kent Police appeals line on 01474 366 149, quoting crime reference XY/038225/18, or via the anonymous Crimestoppers hotline on 0800 555 111 or via the online form at www.crimestoppers-uk.org