Crowds of people have attended a funeral ceremony in the Istanbul courthouse where a prosecutor was taken hostage on Tuesday and who later died after police tried to rescue him. <br /><br /> The two gunmen holding Mehmet Selim Kiraz were also killed in a shootout. <br /><br /> The captors were members of the extreme-left Revolutionary People’s Liberation Party Front (DHKP-C). <br /><br /> On its website, the group said the hostage-taking was an act of revenge for the death of a teenager, whose case was being investigated by the prosecutor. <br /><br /> Fifteen-year-old Berkin Elvan was injured by a police tear gas canister during anti-government protests in 2013 and died nine months later. <br /><br /> DHKP-C sympathisers clashed with police in two Istanbul neighbourhoods in the wake of the hostage siege, local media reported.<br /><br /> Meanwhile, a leftist union website said riot police detained 36 students at Istanbul University after posters referring to one of the dead hostage takers was hung in the law faculty.<br /><br /> Amid the rising tension
