PHILADELPHIA (AP) -- Philadelphia police have arrested two suspects and are searching for a third in the videotaped beating of a city park ranger trying to enforce a no-skateboarding rule.

The beating happened Friday at Love Park, home to a Robert Indiana LOVE sculpture and a one-time skateboarding mecca featured in a video game.

Police say they arrested a 19-year-old and a 17-year-old Monday. Both face charges of aggravated assault, simple assault, recklessly endangering another person and making terroristic threats.

Police say the video shows a skateboarder punching the ranger in the face after refusing a request to leave.

An onlooker's video also appears to show a suspect spitting at and kicking the ranger while he was on the ground. Police say a second suspect taunted him and a third videotaped the incident.

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