Police say unknown bombers detonated locally made dynamite near an important bridge in Nigeria's oil-rich southern delta overnight, though no one was injured.
The blast happened Friday night in Yenagoa, the capital of Bayelsa state, the home of President Goodluck Jonathan. Bayelsa state police spokesman Eguavoen Emokpae said the bomb targeted a bridge, but caused little damage.
The blast occurred as Bayelsa state is under increasing political pressure over an upcoming gubernatorial race in the state. The winner of the race will control a state budget that's larger than some nations surrounding oil-rich Nigeria. Violence remains common in elections in Nigeria, a nation of more than 160 million people and a top crude oil supplier to the U.S.