Hussaini Umar, AfricaNews reporter in Kano, Nigeria
Acting President of Nigeria Goodluck Jonathan has been sworn in as head of state in a brief ceremony at the Abuja Presidential Villa hours after the death of substantive president Umaru Yar'Adua.

Yar'Adua died late on Wednesday in the capital Abuja after protracted illness.
A new deputy is expected to be announced by Jonathan, who has been at the helm of affairs since February to serve the remaining presidential term until next year’s election.
There would be seven days of national mourning.
According to AfricaNews reporter the remains of Yar’Adua would be laid to rest in his Katsina hometown at about 2 p.m. on Thursday.
The Secretary to the Government of the Federation, Yayale Ahmed, disclosed that the burial time was to allow dignitaries and foreign Heads of Government to attend the ceremony.
Born in Katsina in August 1951, Yar'Adua was a devout Muslim who hailed from a distinguished political family.
His father was a minister in the first post-independence cabinet and his elder brother, Shehu, was number two in the military government of Gen. Olusegun Obasanjo from 1976 to 1979.
He was educated at the Ahmadu Bello University, Zaria, where he obtained a B.Sc in Education/Chemistry in 1975 and M.Sc in Analytical Chemistry in 1980.
Yar’Adua began his professional life as a chemistry teacher before going into business in the 1980s.
He contested and won election as Katsina State governor in 1999 and was re-elected in 2003.
Yar’Adua was the first governor to publicly declare his assets and promised to do same again at the end of his tenure, according to the Nigeria news agency.