NEW : two officers hurt , two people arrested after an Orange Order parade in Belfast . NEW : ` ` I am angry we have this annual madness , '' says police chief in Belfast . pro-British and British groups hurled objects as they staged rival demonstrations , police say . Assistant Chief Constable Will Kerr , the officer in charge of the policing operation in Belfast , condemned the attacks on police . British loyalists and police clash in a Protestant district beside British Ardoyne .
NEW : two officers hurt , two people arrested after an Orange Order parade in Belfast . NEW : `` I am angry we have this annual madness , '' says police chief in Belfast . pro-British and British groups hurled objects as they staged rival demonstrations , police say . British loyalists and police clash in a Protestant district beside British Ardoyne .