(Portland, OR) -- Portland Police say they broke up several street racing events over the weekend. Police say officers responded to Lombard in North Portland on Sunday to find a group of 50 to 60 vehicles that quickly moved to Marine Drive, where officers broke it up again. They then allegedly moved to the Lloyd District, where officers were waiting. Police arrested four people, towed 10 vehicles, issued ten citations and seized two illegal guns. On Saturday, police interrupted several racing events and made 29 traffic stops, towed six vehicles and issued several citations.