Police at the Obuasi Len Clay Stadium are firing volleys of tear gas as they struggle to quell riots between fans of Ashantigold and Asante Kotoko.Asante Kotoko were leading by a lone goal before the incident.Elsewhere at the Swedru Park, match officials have been ushered to the police station for protection as fans charge on them for yet-to-be ascertained reasons.The confusion was said to have broken minutes before the game between All Blacks and Eleven Wise could kick-off.