Nigeria’s opposition leader Atiku Abubakar who came second in a February 25 presidential poll took to the streets on Monday along with his supporters to contest the election results.

The electoral body last week declared Bola Tinubu of the ruling All Progressives Congress (APC) as the winner to take over from President Muhammadu Buhari in May.

Almost 25 million people cast ballots in a vote that was largely peaceful but marred by long delays and technical glitches, angering voters and opposition parties who have claimed massive vote-rigging.

Abubakar’s supporters and members of his Peoples Democratic Party (PDP) dressed in black to walk to the Independent National Electoral Commission (INEC)’s headquarters in Abuja and submit a petition, claiming electoral fraud.

INEC has “direct involvement in aiding and abetting the monumental rigging and manipulation of the election results in favour of the ruling party,” said Iyorchia Ayu, the PDP chairman.