Alberto Fernández is the new president of Argentina.
The centre-left opposition candidate came out on top in an election that was marred by severe economic concerns.
He beat conservative incumbent Mauricio Macri, securing more than 45 per cent of the vote.
Marci officially conceded defeat and has congratulated Fernández.
The two met at the presidential palace to discuss an orderly transition.
Russian strikes kill 20, exposing Ukraine's air-defence shortage
Russia hammered Ukraine with missiles and drones early on Monday, killing at least 20 people and exposing Kyiv's critical shortage of US-made interceptors, officials said, just days after the deadliest attack on the Ukrainian capital this year.
Clashes escalate at Sri Lanka prison to leave 25 dead, many more injured
Twenty-five people were killed and about 100 injured as security officials struggled to contain two days of clashes between rival groups of inmates at a prison in Sri Lanka, authorities said on Monday, marking the deadliest such violence in years.
Six killed in India's Mumbai as rains wreak havoc, disrupt travel
At least six people have been killed when a group of buildings collapsed in the eastern suburbs of India's Mumbai on Sunday, the latest casualties of heavy rains that have disrupted travel and shut down schools in the city.
Wildfire in southern France forces 10,000 people from their homes
A wildfire burning out of control in southern France has forced the evacuation of over 10,000 people from two dozen small towns and villages near the Spanish border, and officials said on Monday strong winds would further fan the flames.
Folarin Balogun to play for US after FIFA suspends red-card ban
Folarin Balogun of the United States men's national team is eligible to play in its round of 16 match against Belgium following the suspension of his one-game red card ban, the USMNT has announced on Sunday.
