Firefighters were called to a suspected gas leak at a supermarket in Enniskillen on Saturday morning.
Three fire appliances, two from Enniskillen and one from Irvinestown, attended the incident shortly before 10am at Tesco on the Derrycharra Road after staff reported smelling gas.
A spokeswoman for the Northern Ireland Fire and Rescue Service said: “Firefighters were called to a report of a gas leak and using a gas monitor confirmed no presence of gas in the area.
“At the request of the gas supplier they isolated a valve to a tank,” she said.