Police fired rubber bullets, stun grenades and tear gas at protesters who hurled stones and set up barricades with dumpsters and burning tyres in several neighbourhoods. In at least one neighbourhood undercover Israeli police officers disguised as protestors wrestled demonstrators to the ground and handcuffed them. Police spokesman Micky Rosenfeld said four officers were briefly taken to hospital and another 10 were treated on the spot, while 60 Palestinians were arrested.