Midway Airport in Chicago was temporarily disrupted when an item of baggage exploded on the tarmac.
The bag, which was being loaded onto a Volaris flight bound for Leon, Mexico was run over by a baggage vehicle and then exploded.
A bomb squad was called and determined there was no safety risk.
Chicago Police Department spokesman Anthony Guglielmi said it was caused by a cellphone battery or charger exploding.
"The bag was actually run over by a luggage vehicle and did not combust or explode on its own," he tweeted.
"Thanks to everyone for being vigilant and to the firefighters, officers and technicians who assisted."
The Federal Aviation Administration said there was no impact on flight operations, while ground handling operations were back to normal within a short time.
