Deposed Iraqi dictator Saddam Hussein has gone on hunger strike to protest the killing of his lawyer, his lead lawyer Khalil al-Dulaimi said today.‘‘Saddam and 55 other detainees (former regime officials) are on a hunger strike since yesterday after the killing of Khamis al-Obeidi,’’ said Dulaimi.Dulaimi said Saddam and the others wanted US and international committees to give guarantees ‘‘for the security of the other defence lawyers.’’A US military spokesman, on being contacted about the protest, said he was ‘‘unaware of the strike and will check it out.’’