There were a series of seven explosions caused by 20-pound propane cylinders, the Pioneer Press reports. A firefighter was treated for possible heat exhaustion. No other injuries were reported.
The blaze was at Smith Foundry, 1855 E. 28th St., the Star Tribune reported, although the Pioneer Press said the fire was at Bituminous Roadways Inc., at 2825 Cedar Ave. S.
The cause of the fire is not yet known. The Red Cross was called to the scene, KARE 11 reports.