The United Nations headquarters in Abuja was bombed on August 20, 2011 by the suspects whose whose photograph is shown.
The leader of the bombing team, Salisu Mohammed is an Arsenal fan, Inusa Mukailu, Danzumi Haruna and Abdulsalami Adamu, were said to have perfected the terrorist act which killed 23 persons and wounded 75 others.
Among those affected by the explosion included members of staff of the UN, visitors and workers of private businesses stationed within the building.
The accused persons, who are answering to a four-count terrorism charge, were arrested in September 2012 and charged before an Abuja Magistrate court.

http://www.primesoccer..com/2013/11/picture-arsenal-fan-who-bombed-united.html

click the link for picture as i dont know how to paste image on NL