Gaza’s Hamas-run interior ministry has said that at least 20 people have been killed in an operation targeting “gangs” accused of looting trucks bringing aid into the war-torn territory which is facing the threat of famine. Gunmen attacked and looted about 100 trucks carrying desperately needed supplies over the weekend, the biggest such attack during 13 months of war in the territory and new evidence of the growing power of Gaza’s criminal gangs. In a statement late on Monday, the Gaza interior ministry said that more than 20 people had been killed “in a security operation carried out by security