2 people are arrested Friday and 3 officers injured , police say . `` Violence is never an acceptable response '' to disagreements , she says . Violent disorder broke out in Northern Ireland after a vote on flying the state flag . Belfast is the last leg of the secretary of state 's European tour .
3 people are arrested Friday and 2 officers injured , police say . `` Violence is never an acceptable response '' to disagreements , she says . Violent disorder broke out in Belfast after a vote on flying the Union flag . Northern Ireland is the last leg of the secretary of state 's European tour .