Elections in Africa's most populous nation have often been marred by violence, claims of vote-rigging and logistical problems since it emerged from military rule in 1999.
Umbrella group representing cattle herders says explosion was caused by Nigerian military jet but officials say blast in north central Nasarawa state was caused by a drone, without specifying who was operating it.
The herders and their cattle were in Rukubi, a village on the border between Nasarawa and Benue states when a bomb exploded in their midst, according to authorities.
Lekki Deep Sea Port is one of the biggest in West Africa and is expected to create hundreds of thousands of jobs in addition to easing cargo congestion that costs billions of dollars.
Authorities in Edo state say they are intensifying their operations to rescue the kidnap victims as the Nigerian Railway Corporation (NRC) temporarily shut the station where the attack took place.
Authorities say they rescued 80 people, fished out 10 bodies and continue search for 10 missing after the vessel capsized in River Niger.
UNICEF says around 20.2 million children are under the threat of severe hunger, thirst and disease as climate crisis, conflict, global inflation and grain shortages devastate the region.
The incident happened as the crowd were watching a parade at a popular carnival in southeast Nigeria, officials say
Violence in the northeast has killed over 40,000 people and displaced around two million from their homes since 2009, according to the United Nations.
The military operations were conducted when the terrorists were organising a meeting in a forest, says a Nigerian military expert.
The attacks took place separately on Sunday night in the Malagum and Sokwong communities, a local administrator said.
While the prospects are exciting for the continent, governments and companies must ensure that the native populations get access to the alternative energy sources.
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