A former interior minister, Mohamed Bazoum, has won Niger's presidential election, which has been hailed as the first democratic transition for the coup-prone West African state.
He took 55.75% of the vote, said the electoral commission, with opposition candidate Mahamane Ousmane on 44.25%.
Supporters of Mr Ousmane, a former president, have protested in the streets, alleging fraud.
Niger struggles with frequent droughts, insurgency and widespread poverty.
The world's poorest nation according to the UN's development rankings for 189 countries, it outlawed slavery as late as 2003.
It has been affected by a spillover of violence from two jihadist insurgencies in neighboring Mali and Nigeria.
Mr Bazoum, 61, was the candidate for the governing party in Sunday's second-round run-off vote. He is set to succeed President Mahamdou Issoufou, who is stepping down after two five-year terms.
However, supporters of the defeated Mr Ousmane have gathered in areas seen as his strongholds in the capital, Niamey.
The BBC's Lalla Sy, in neighbouring Ivory Coast, reports that tyres are being burned and stones have been thrown at a vehicle belonging to the governing party.
Mr Ousmane, 71, was the first democratically elected president of Niger in 1993 but was overthrown in a military coup three years later.
The provisional results must still be confirmed by the constitutional court.
Latest Stories
-
Commercial drivers damn threats, unilaterally hike transport fares
6 mins -
Women face mounting pressures, feel unsafe at workplace – Deloitte
18 mins -
Bright Simons asks: Where is the KPMG report on SML contract audit?
33 mins -
GEXIM to celebrate Ghanaian workers with “Workers’ Mart Tuesday Market”
1 hour -
Ghanaians need honesty on the part of the government – Alhassan Suhuyini
2 hours -
We cannot compete; we need to collaborate – George Quaye on projecting theatre
2 hours -
GRIDCo to receive 100MW power supply from IPPs in coming days
2 hours -
How technology is weaving African markets into the global fabric
2 hours -
Dr. Ekua Ekumah highlights how to cultivate new theatre audience
2 hours -
Zambian FA president charged with money laundering
3 hours -
Mysstel releases video for ‘Paradise’
3 hours -
We are yet to receive an apology from Ashanti Regional Minister – ECG
3 hours -
UEFA International Tournament: Ernest Ofori scores for Black Starlets in defeat to Russia
3 hours -
Cocoa price surge linked to production decline – COCOBOD CEO
3 hours -
Atarah Praise returns on May 19 at Adenta Barrier
3 hours