(CNN) Several people were injured Saturday during the Capital Pride Parade while running from what they thought were gunshots, authorities said.

Cmdr. Guillermo Rivera of the Metropolitan Police said police were responding to a call of a man with a gun. As they approached the scene, they encountered people who said shots had been fired.

Rivera said there was no evidence that shots were fired.

Officers arrested a man for possession of a firearm that turned out to be a BB gun, according to a police report. Police had earlier said a handgun was found nearby.

The report says an officer observed people fleeing from the parade and someone pointed out the suspect, saying he had a gun in his bag. Police approached the suspect and discovered it was a BB gun, the report says.

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