FARGO - Police are investigating after someone shot at a Fargo street sweeper early Friday morning.

It happened about 4:30 a.m. on Fourth Avenue North and Roberts Street in downtown Fargo.

At least three shots were fired, the sweeper had two chips in the windshield and a dent near the windshield.

Police believe it was a BB gun, based on the damage to the sweeper.

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The driver was not hurt.

No arrests have been made. Police are looking at video from downtown street cameras as part of the investigation