Crews were on scene of a fire that broke out in a stripmall in Milford late Monday night.
The call came in a little after 10 p.m.
Officials said the structure, located at 51 Roses Mill Rd., partially collapsed while they were working to put out the flames.
Fire was in the basement and on the first floor when they arrived. It quickly spread into the attic.
Crews finally got it under control around 4 a.m. on Tuesday. It was reduced to hot spots later in the morning.
They said the back wall of the building was the portion that partially collapsed.
According to a battalion chief, the building had been vacant for 15 to 20 years. It had previously been Rob's Deli and a VCR rental location.
Following the fire, the building was deemed uninhabitable and fenced off.
It is unclear if anyone was inside the building when the fire broke out.