Gun attacks on the British Army increased . Six soldiers were wounded in the first day after internment , and shortly afterwards a soldier was killed — the first to be killed by either IRA in Derry . The army moved in in force on 18 August to dismantle the barricades . A gun battle ensued in which a young Provisional IRA officer , Eamonn Lafferty , was killed . A crowd staging a sit @-@ down protest was hosed down and the protesters , including John Hume and Ivan Cooper , arrested . With barricades re @-@ appearing as quickly as they were removed , the army eventually abandoned their attempt .