Masked raiders hit three convenience stores in a single day, punching staff in the face and smashing a door with a hammer.
Robbers burst into Danny's Store in Churchill Road, Cheam, and punched a member of staff in the face before grabbing a woman by the neck and taking money from the till at around 10.15pm on Sunday.
The men, who wore hoods covering their faces, smashed the door with a hammer on their way out.
The second and third incidents happened within minutes of each other shortly after 9.10pm on Monday. Tills were stolen from Best One in London Road, Hackbridge, and from Allsorts News in Butter Hill, Carshalton. The two suspects in both incidents were wearing red bandanas.
If you have any information about these incidents you can call Detective Constable Jim McKnight on Sutton's burglary and robbery investigation team on 0208 649 0777.