Dallas Firetruck Struck by Unidentified Flying Object: Police | NBC 5 Dallas-Fort Worth

Dallas Firetruck Struck by Unidentified Flying Object: Police

No firefighters injured in incident

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The glass on a Dallas firetruck was shattered Friday by an unknown object, Dallas police now say.

Dallas Fire-Rescue's Engine 19 was driving down Interstate 30 near Munger Boulevard when one of its windows shattered.

The firefighters on board thought they had been hit by a rock, but during the course of the investigation they found reason to believe it was something other than a rock that shattered the window.

Dallas police originally told NBC 5 that the glass had been hit by a bullet, though later backed off of that statement and said they were unable to confirm that information.

Just after 2 p.m., police said the police department's crime scene response unit found no evidence  a bullet or projectile shattered the glass. 

Exactly what caused the glass to break remains a mystery.

None of the firefighters were injured and they were not headed to an emergency when the glass shattered.