Police in Tucson, Arizona, jokingly warned residents to beware a "suspicious white powdery substance" after the city saw rare snowfall recently. 

"Tucson's never seen anything like this before," Sgt. Pete Dugan says in a video posted on Twitter by the department on Friday. "We've gotten lots of calls about a white powdery substance all over."

Dugan goes on to say that the crime scene team would be investigating.

"As soon as we get a call from the crime lab back, we will let you know exactly what's going on here right now," he adds. 

The crime lab then phones Dugan to let him know the suspicious substance is, in fact, frozen water. 

"Guys, let's tear this down," he says, gesturing to the crime scene tape roping off a snowman. 

At the end of the video, the cops get into a playful snowball fight. 

A winter storm dumped 2 inches of snow in the metro area Friday, the most the city had seen in six years. 

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