A two-alarm fire broke out at a semi-detached house in Leslieville that spread next door early Tuesday morning.

Toronto fire sent 12 trucks and 45 firefighters to Booth Ave., between Queen St. E. and Eastern Ave., at around 3:30 a.m.

The blaze started in a house that was undergoing renovation and spread to the adjacent house, Toronto fire Captain Adrian Ratushniak said.

Eric Ing, whose house is across the street and was awake when the fire broke out, told the Star that he saw the homes were covered in flames.

When he ran outside, he saw heavy smoke and flames coming from the roof.

Ing said the people who lived in the adjacent house were on his front yard crying as they watched their house go up in flames.

“They said they heard crackling next door and got up to investigate then realized the house (they shared a wall with) was on fire,” he said.

Ratushniak said no one was injured. Residents from the two houses next to the semi-detached homes were evacuated and put on TTC buses temporarily.

Firefighters were able to contain the fire from spreading to nearby houses.

Ratushniak said the fire was put out at around 6:20 a.m.

Police believe that part of the building will have to be demolished because the section that was under renovation was heavily damaged and is “unstable.”

There’s no word yet on what caused the blaze.