On the 1st 4/20 celebration in Colorado since the legalization of marijuana, thousands were scattered when an unknown gunman fired into a crowd at Civic Center Park in Denver on Saturday.

While most people were just hanging out enjoying the celebration, the sound of what many thought were firecrackers blasted the air. The celebration turned to panic when a man and his dog went down with what ended up being gunshot wounds. A lady was also shot, and a third person was grazed by a bullet. All injuries are considered non life-threatening.

Police are on the lookout for one or two suspects, according to the Associated Press, and are asking for anyone with photos or videos to come forward.

No motive for the gunfire is known.