The Knoxville Fire Department is investigating the cause of a fire at a Nixon's Deli in Fountain City.
Firefighters responded to the restaurant off North Broadway Sunday night just after 9:00.
Firefighters have extinguished the fire. No one was in the restaurant when it broke out.
Knoxville Fire Department spokesperson D.J. Corcoran says the restaurant's location in a strip mall posed a challenge.
"It's a strip mall here. You've got a golf shop, a medicine shop, a hair salon all in line there," said Corcoran. "They share a common attic so what we're trying to do is cut a trench in the roof across City Salon and push the fire back toward Nixon's Deli."
KFD says they are not sure what started the fire at this time.