Hackers have targeted the website of Ghana’s electoral commission as votes are counted after tightly contested elections.
The commission says the website is up again, and an attempt to put up “fake results” failed.
In a tweet, it urged people to ignore the “fake results” circulating on social media.
President John Mahama is facing a strong challenge from main opposition leader Nana Akufo-Addo.
Wednesday’s election passed off peacefully, but voting was postponed to Thursday in one constituency after voting material failed to arrive on time.
A run-off will be held later in the month if neither of the two main candidates secures more than 50% of the votes.
The campaign was dominated by Ghana’s faltering economy.
In the previous election in 2012, Mr Mahama defeated Mr Akufo-Addo by less than 300,000 votes.
“We deplore the attempt to hack the EC’s [electoral commission’s] website. Please respect the integrity and independence of the EC,” it said in a tweet.