Bomber blows herself up at rally
Police say a bomber blew herself up in a vehicle packed with explosives near where Nigeria's president had just held an election rally in the north-eastern state of Gombe.
Deputy Superintendent Fwaje Atajiri said the explosion occurred in a near-empty area and about a mile from the venue which President Goodluck Jonathan had just left.
He said two other suicide bombings in Gombe city on Sunday injured a few people - but killed only the bombers.
No one immediately claimed responsibility.
Most suicide bombings are blamed on Boko Haram Islamic extremists who are against democracy and have vowed to disrupt the February 14 elections for president, state governors and legislators in Nigeria - Africa's richest and most populous nation.