vote - counting postponed until Tuesday morning , election leader announced in tweet . Partial vote counting shows opposition candidate leading in Nigeria , news reports . Incumbent President Goodluck president and opposition Gen. Muhammadu Buhari backed off in protest .
Vote-counting postponed until Tuesday morning , election leader says in tweet . Partial vote count shows opposition candidate leading in Nigeria , Reuters reports . Incumbent President Goodluck Jonathan and retired Gen. Muhammadu Buhari faced off in election .