Police are investigating an assault after a woman was caught on CCTV slapping a vulnerable man aged in his 20s across the face.

Officers are issuing a CCTV image of a woman they would like to trace in connection with the assault in Lowestoft.

The incident occurred between 4.30pm and 4.35pm on Monday, May 20 in London Road North.

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The assault caused reddening to the man's cheek after he was attacked while walking past the old Tesco site.

Detectives would like to speak to the woman pictured in the CCTV image about the incident.

Anyone who recognises the woman or who has any information is asked to contact the Lowestoft Response Investigation Team, quoting reference: 28057/24.