NEW YORK (CBSNewYork) — Police said two aerosol cans with a detonator exploded in a moving car in the Bronx Wednesday evening, and it was not believed to be an accident.

The two occupants of the car escaped without injury.

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Around 7:10 p.m., police were called to Mahan and Roberts avenues in the Pelham Bay section of the Bronx for a report of an explosion, police sources told CBS2.

They found two aerosol cans under the wheel well, and one had a detonator, sources said.

One of the devices detonated when the car was in motion sources said.

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A 24-year-old man was driving at the time, and a 28-year-old woman was in the car as a passenger, sources said. Neither was injured.

The explosion deployed the car’s airbag, sources said.

The car was described as red sedan with Ohio license plates.

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Late Wednesday, there had been no arrests and the investigation was ongoing.