Police are trying to identify a man following allegations of harassment.
The victim was at Tesco in Fullbridge, Maldon, when he became alarmed by the suspect’s behaviour and alerted security staff.
Police are looking for a man described as white, about 6ft 3ins tall and of medium build.
He had short grey hair, blue eyes and is thought to be in his 40s.
The alleged incident was at about 10.45am on Monday, January 27.
Call PC Tim Neate at Maldon police 101 or Crimestoppers anonymously on 0800 555111.