U.N. Secretary-General Ban Ki-moon has condemned the attack on a United Nations compound in Nigeria that has reportedly killed 18 people and wounded several more “This was an assault on those who devote their lives to helping others,” Ban said. “We condemn this terrible act, utterly.” Ban said the building, home to 26 humanitarian and development agencies, was hit by a car bomb at around 11 am local time. He said he is dispatching Deputy Secretary-General Asha Rose Migoro to lead a team to investigate the attack. Witnesses said that a sedan rammed through two separate gates at the U.N. compound as guards tried to stop the vehicle. The suicide bomber inside crashed the car into the main reception area and detonated the explosives, inflicting the most damage possible, a spokesman for the Nigerian National Emergency Management Agency said.