Update 4 p.m. Monday
The Billings Fire Department said the blaze was "likely human caused" and the building had been broken into several times and occupied by transients.
In a press release, fire officials said the blaze at 503 N. 25th St. was reported at 9:34 a.m. Monday. There were no reports of injuries or fatalities.
The fire caused estimated loss and damages of $40,000. The cause of the blaze remains under investigation.
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BILLINGS - Fire crews responded to a blaze in downtown Billings on Monday morning.
The fire in the 500 block of North 26th Street was reported at about 9:30 a.m.
The fire was burning in what appeared to be a vacant building.
Traffic in the areas was blocked off between Fourth Avenue North to Sixth Avenue North.
Watch raw video of the fire below:
This is a developing story. Check back for updates.