A man has been released on police bail following the devastating fire at Flava 36 in Aylesbury High Street in the early hours of Monday morning.
The 29-year-old from Aylesbury was arrested on suspicion of arson with intent and he has been bailed until January 13 pending further enquiries.
Police were called to the shop at 2.24am in relation to the incident, which was also attended by Buckinghamshire Fire and Rescue Service.
Sixteen people including three children were evacuated from nearby properties and placed in temporary accommodation.
Detective Sgt Simon Johnson, who is investigating the incident, said: “The fire could have had extremely serious consequences for people living above the premises and it was very fortunate that the fire was spotted in its early stages and emergency services were alerted quickly.
“I am appealing for anyone who may have seen anything suspicious in the area at around 2am on Monday to contact the police.”
Nobody was injured during the incident which destroyed the ground floor of the building, while the first and second floors were damaged by smoke.
Anyone with more information about the incident is urged to contact Sgt Johnson via the Thames Valley Police Enquiry Centre on 101 or Crimestoppers anonymously on 0800 555 111.