Three Oregon State Police troopers suffered minor injuries arresting a 15-year-old in downtown Portland who was armed with a handgun, metal knuckles and a knife.
Police responded to Southwest 4th and Taylor where the teen was pointing the gun at people. When a trooper tried to arrest the suspect, police say a hostile crowd surrounded the officers, so a crowd control unit was called for backup.
When the crowd started throwing things at officers, including a glass bottle that shattered on an officer's helmet, police used munitions to clear the area.
The gun turned out to be a pellet gun. The teen was detained and turned over to his parents.
A demonstration was held Monday night outside of a police building at 47th and East Burnside in Portland.
Police say the crowd started throwing objects, including paint balloons, at them and shining lasers in their eyes.
One officer was injured by a demonstrator swinging a baton another officer was punched.
Police arrested two people.
The demonstration broke up around 1:30 a.m.Tuesday.