On ' '' 29 May 2011 ' '' , a few hours after Goodluck Jonathan was sworn in as president , several bombings purportedly by Boko Haram killed 15 and injured 55 . On ' '' 16 June 2011 ' '' , Boko Haram claimed to have conducted the Abuja police headquarters bombing , the first known suicide attack in Nigeria . Two months later the United Nations building in Abuja was bombed , signifying the first time that Boko Haram attacked an international organisation . In '' ' December 2011 ' '' , it carried out attacks in Damaturu killing over a hundred people , subsequently clashing with security forces in December , resulting in at least 68 deaths . Two days later on Christmas Day , Boko Haram attacked several Christian churches with bomb blasts and shootings
attacks in Damaturu
2011 Damaturu attacks
Boko Haram insurgency