Nigeria's army chief, Lt-Gen Ibrahim Attahiru, has been killed in a plane crash.<br />'' <br />''President Muhammadu Buhari said he was deeply saddened by the demise of the General.<br />'' <br />''Gen Attahiru, 54, only took up his post in January in an overhaul of the military's top brass.<br />'' <br />''The Nigerian Air Force said the accident took place as the plane was landing at Kaduna International Airport.<br />'' <br />''<span style="color: #222222;">Ten other officers, including the plane's crew also perished.</span><br />