President Obama has apologised after two Western hostages were accidentally killed when US forces attacked an al Qaeda base on the Afghan-Pakistani border in January.<br /><br /> Warren Weinstein, an American doctor, and Italian Giovanni Lo Porto had been held in the border region of Afghanistan and Pakistan. <br /><br /> Obama said US forces believed the target was an al Qaeda compound with no civilians present.<br /><br /> “This morning I has expressed my grief and condolences to the families of two hostages – one American, Warren Weinstein, and an Italian, Giovanni Lo Porto – who were tragically killed in a US counter-terrorism operation. Warren and Giovanni were aid workers in Pakistan devoted to improving the lives of the Pakistani people,” the president said at a White House briefing.<br /><br /> Obama added that the operation in January was also believed to have killed al Qaeda leaders.<br /><br /> He has ordered details of the operation to be declassified.<br /><br /> Describing the two Western victims as brave men, the president said
