A CCTV image has been issued by police as they try to trace witnesses to a knife-point attack.
Around 7.10pm on Friday, June 17, a man entered the Subway sandwich shop in Chester Road, Sunderland, armed with a knife and threatened the member of staff.
The man demanded money before fleeing the store empty handed.
The offender was described as white, in his 20s, around 5ft 5ins tall and was wearing a black jacket with a scarf covering his face.
He spoke with a local accent.
It is also believed he was wearing what is believed to be an Atlanta Braves baseball cap.
Officers have been carrying out inquiries into the incident and have identified an individual captured on CCTV in the area who appears to match the description of the offender and is wearing a black jacket with a scarf covering their face.
It was previously thought the attempted robbery was linked to a previous robbery at the NISA store in Hylton Road on June 12, however, this has since been ruled out and a man has been arrested in connection with this robbery.
Inquiries are ongoing in the area and anyone with any information is asked to contact police on 101 quoting reference number 967 170616 or Crimestoppers anonymously on 0800 555 111.