DUBLIN (AP) — Northern Ireland police fought day-and-night street battles with Protestant militants Saturday as a protest march to Belfast City Hall degenerated into riots when many marchers returned home to the Protestant east side.

The Protestants, who have blocked streets daily since Catholics on the council decided Dec. 3 to curtail the flying of the British flag, have frequently clashed with police in hopes of forcing politicians to overturn the decision. The street confrontations have stirred sectarian passions, particularly in Protestant east Belfast and its lone Catholic enclave, Short Strand, flashpoint for the most protracted rioting over the past six weeks.