The bloodied bodies of several policemen could be seen at the blast site next to police vehicles that had been stationed there.
Akufo-Addo is running against incumbent John Mahama in a nail-biting election.
Somalia has set another date for the presidential elections, which had been rescheduled three times.
Separated from his mother shortly after birth, Manno the chimpanzee was smuggled to Iraq and spent his days smoking cigarettes.
Ghana's main opposition NPP party has said its candidate Nana Akufo-Addo has an unassailable lead in a presidential election.
Doctors' union threatens to shut down private and mission hospitals too.
The continent needs to change the way it viewed farming, and see it as a big-time business.
Sporadic reports of violence and technical problems marred the vote although the election was seen to have gone well overall.
After 30 years of turmoil for the postal service in the Democratic Republic of Congo, letter carriers clad in smart canary yellow shirts have finally returned to the streets.
Poll seen as a litmus test of stability for one of Africa's most secure democracies