A fire in London responds to a fire at Pizza Hut in London, Ontario.

The London Fire Service responded to a fire at a Pizza Hut restaurant in the east of the city late on Tuesday afternoon.

London Fire responded to the blaze shortly before 4pm, where flames could be seen through the roof.

In a tweet, London firefighters said crews were greeted by thick smoke and fought the blaze from outside and inside the Pizza Hut, located at Huron Street and Highbury Avenue.

The Pizza Hut and surrounding businesses had to be evacuated.

No injuries were reported.

“Obviously today, being a hot and humid day, the concerns are for the health and safety of our firefighters…making sure they have enough rehabilitation time…coming out with plenty of water… going out with the fire hoses making sure there are no contaminants left,” Gary Mossburger of the London Fire Service told CTV News.

The primary and secondary excavations of the premises are now complete.

Road closures are also in effect while the investigation continues, with Huron Street closed eastbound and westbound just before Highbury Avenue. The northbound right lane of Highbury Avenue just across the square is also blocked by emergency vehicles.

“Kudos to Pizza Hut and nearby businesses for helping with the evacuation before we arrived,” London Fire wrote on Twitter.

The cause of the fire and the estimated damage are currently unknown, but first responders remain at the scene.