Size of the crowd: 3,000 to 4,000 Police officers: 80 Arrests: 52 Number of rounds of tear gas fired. 13 In addition, officials fired 20 sting ball grenades, 20 "flash bangs" and 24 smoke grenades. Number of damaged police vehicles: 2, a windshield was smashed in one vehicle. The left rear window was smashed in another.