Four people were shot dead by Afghan security forces on Saturday as protests over the burnings of the Muslim holy book at a NATO base erupted for a fifth day.<br/> <br />Protesters were attempting to bombard a U.N. compound in the north.<br/> <br />The burning of the Korans at the Bagram compound this week has deepened public mistrust of NATO forces struggling to stabilise Afghanistan before foreign combat troops withdraw by end-2014.<br/> <br />Friday was the deadliest day of prostests, with 12 dead.
