Since late 2011, Potiskum, about 500 kilometers (300 miles) northeast of Nigeria's central capital, Abuja, has been targeted by Boko Haram fighters in attacks.

NPR: Attackers Kill 3 North Korean Doctors In Nigeria

At the end of two weeks of knotty peace talks in Abuja, Nigeria's capital, Sudan's government promised to allow aid agencies free access to its western region of Darfur a promise it has made and broken several times before.

ECONOMIST: Sudan

"It's just a mark of appreciation from the good people of Nigeria, " Yar'Adua said during a state reception in the country's capital Abuja on Saturday.

BBC: SPORT | Football | African | Nigeria honours under-17 players