NEW : A police officer is injured as a handful of far-left and far-right demonstrators clash . NEW : About 5,000 members of Islamic far-right groups rally in the United Kingdom , police say . NEW : About 5,000 people turn out for a counter anti-fascist demonstration , police say . One police officer suffered minor head injuries after he was struck by a bottle , Husted said , but no civilians were hurt or damage caused to buildings . The far-right the English Defence League says it wants to highlight the threat of European extremism .
NEW : A police officer is injured as a handful of far-left and far-right demonstrators clash . NEW : About 5,000 members of Islamic far-right groups rally in the United Kingdom , police say . NEW : About 5,000 people turn out for a counter anti-fascist demonstration , police say . The far-right the English Defence League says it wants to highlight the threat of European extremism .