POLICE are appealing for witnesses after a teenage motorist was sprayed in the face with a mystery substance by three men.

The lad was attacked by the trio after pulling over at the junction of Thundersley Park Road and Clarence Road, Benfleet, at 7.45pm on Tuesday, October 5.

The men, who were travelling behind the teen in what is thought to be a silver Ford Fiesta, approached his car and sprayed the boy in the face with an unknown substance, causing him to suffer sore eyes.

Now police want to trace a Good Samaritan who called an ambulance, as well as other people who may have seen what happened in the lead up to the assault.

Investigating officer PC Sean Boral said: “It is believed that a member of public called the ambulance and we would like to speak to that person who could have key information to help us get a fuller picture of what happened."

Anyone with information is asked to call PC Boral at Canvey Police Station on 0300 3334444.