A man is been sought after inappropriately touching himself in front of a teenage girl on a train in Brentwood.
British Transport Police detectives have released CCTV images of a man they would like to speak to in connection with the incident, which took place on Friday, May 3.
The victim, a 14-year-old girl, boarded a London-bound train at Shenfield station around 4.25pm but soon after she noticed a man sat opposite her "touching himself inappropriately".
She left the train as it pulled into Brentwood station a few minutes later, followed by the man.
Detective Constable David Bishop, the investigating officer, said: "He continued to follow her for around 10 minutes as she walked away from the train station towards Kavanaghs Road, where she lost him."
DC Bishop added: "This was a very traumatic experience for the victim, who was returning home from school. "Although she wasn't physically injured, she was left understandably shaken by this incident.
Anyone with information is asked to contact British Transport Police on 0800 40 50 40.
