RIVERHEAD – Police are looking into a video posted online of professional BMX cyclists at Splish Splash in Riverhead.

The video was posted on YouTube on Saturday by professional rider Billy Perry, of West Islip.

The video appears to show a group of BMX riders at Splish Splash on Thanksgiving riding and doing tricks on the water slides.

It also shows the group entering the park by hopping over barbed wire fences. The riders posted their own names, apparently knowing that they were breaking the law.

« It’s going to be insane if we don’t get arrested, » Perry says in the video. « Hopefully we don’t get arrested. »

He also says that the group spent about two hours in the park before a security worker spotted them.

Splish Splash general manager Mike Bengtson says Perry and his crew caused about $50,000 worth of damage to the slides.

Riverhead police say they are looking into the video and investigating the incident.