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UPDATE: Crews investigating what sparked blaze at N.E. Oklahoma City building

OKLAHOMA CITY – Crews are still battling hot spots after a massive fire burns through a northeast Oklahoma City building overnight.

Authorities said flames engulfed the building near N.E. 23rd St. and Kelley Ave. just after 10 p.m.

At one point the roof of the vacant business collapsed

No fire crews were injured.

Officials said someone at a nearby business called to report the blaze.

Crews said they had a hard time putting out the fire because stacks of tires were inside the building.

The good news is, no one was seriously injured in the fire.

Fire crews are still investigating what sparked the flames.