Fire crews battled a massive blaze Monday night at a Winnipeg warehouse where explosive fuels used in car racing are stored.

Plumes of thick, black smoke could be seen across the sky as the fire raged at Speedway International on Nicolas Avenue. Witnesses videotaped huge fireballs, and several explosions were heard in the area.

Chemicals in the blaze and explosive fuel forced officials to evacuate at least 100 homes in the area, and firefighters also had to withdraw for their own safety.

On its website, Speedway International says it sells “racing methanol.” The fuel is used in Indy car racing and drag racing.

The fire broke out before 6 p.m. local time and by 9 p.m., firefighters had to pull back as the blaze intensified.

All employees have been accounted for and there have been no reported injuries.

CTV’s Jill Macyshon reported that hundreds of litres of fuel and two tankers at the site were in danger of exploding.

With files from The Canadian Press