Fire crews called to Maynard Steel Co. late Saturday night

MILWAUKEE (WITI) -- Fire crews were called to the Maynard Steel Company near 27th and Parkway Drive just before midnight on Saturday, June 1st -- after flames were seen on the roof.

Officials say three people were inside at the time of the fire, but were able to escape safely.

Officials say the fire caused about $20,000 in damage -- and the cause of the fire remains under investigation.