A teenage boy is among four people arrested after staff were threatened with a knife during a robbery at the Tesco Express store in Eastwood.
Three men have also been arrested and quizzed after money and cigarettes were taken from the Nottingham Road premises at around 10.30pm on Friday April 11.
At first three people — two men, aged 28 and 22, and a 15-year-old boy — were arrested.
The fourth person, a 29-year-old man, was arrested on Sunday, April 13. All four have been bailed by police pending further enquiries.
Police have appealed for anyone with information to call them on 101 or Crimestoppers anonymously on 0800 555111.