LOS ANGELES (CBSLA.com) — Authorities say a 6-year-old boy was slightly injured after being knocked down from his bike during Sunday’s CicLAvia event.

The incident happened around 1 p.m., after someone crashed into the child’s bike, the LAPD said in a written statement.

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The boy, who was not wearing a helmet at the time, bumped his head on the pavement, according to police.

First responders arrived and treated him at the scene.

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Then, he was released.

The LAPD said Sgt. Seagrave, who witnessed the collision, got ahold of the child’s parents and three brothers, none of whom had helmets.

Because the family only had $3 in cash on them, the sergeant subsequently purchased helmets for the children from a nearby bike shop.

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CicLAvia was inspired by a similar car-free event in Bogota, Colombia. The next CicLAvia event for Los Angeles is scheduled for 9 a.m. on Dec. 7.