Atiku’s supporters receive him in Yola

Official results have yet to be announced, but the two leading candidates are running neck and neck in results tallied by local media. Disappointingly, Tuesday's election witnessed a low voter turnout compared with 2017.

A deadly fire at Cuba's main oil terminal Matanzas is still burning days after one of its gas tanks was struck by lightning. Mexico and Venezuela have deployed teams to help contain the blaze.

Footage circulating on social media shows black smoke rising in the area of a Russian military air base in Crimea. Meanwhile, Russian oil transit has been reportedly halted to three EU countries.

Serena Williams delivered an impressive physical performance in challenging conditions to return to winning ways at the Toronto Open on Monday and then said she can see the light at the end of the tennis tunnel in her career. Williams was forced to dig deep during her 6-3 6-4 first-round victory over Spain's Nuria Parrizas Diaz that saw the two women exchange blasts from the baseline in sweltering conditions on a hot and humid centre court.

The leaders of Estonia and Finland have called for European nations to stop issuing tourist visas to Russians. Both nations are being used as a route for Russian tourists seeking to skirt an EU ban on air travel.

Stacks of hairy yams line a market in Ibadan, Nigeria, where traders haggle over quality and price before loading them into cars for the last mile to consumers. Nearby, a man navigates heavy traffic with a hand cart piled high with the tubers. Yams - pounded into paste, ground into flour, boiled or fried – provide sustenance and livelihoods across West Africa.