Smoke billowed from a four-car garage fire Tuesday in Scottsdale that forced first responders to use defensive tactics because of explosions coming from the  building.

Firefighters responded to the blaze about 12:50 p.m. Tuesday Dec. 6, near 66th and Mescal streets.

The garage was “well-engulfed” when they arrived, and crews were met by “small explosions” from ammunition inside, officials stated in a release.

“Because of the dangerous conditions, Scottsdale Command decided to change strategies from offensive to defensive. Crews set up a hot zone and master streams to fight the fire,” the release stated.

A drone was launched, providing an overhead view to help protect firefighters and keep an eye on potential threats to nearby homes, officials said.

The fire was upgraded to a first alarm, and Phoenix, Tempe and Mesa Fire departments assisted in fighting this fire.

No homes in the area were damage, fire officials said.