In a tweeted video the Multnomah County Sherriff’s office said Portland Police are investigating an assault that took place at Delta Park.

Delta park was the location where the Proud Boys held a rally on Saturday.

The rally comes after numerous nights of violent protests by members of Antifa.

In the video authorities say it happened to a person “documenting” the right wing rally.

Authorities say they are investigating.

Details to come.