Luiz Inácio Lula da Silva has won a historic fourth term as president of Brazil, completing a dramatic election comeback against the far-right candidate Flávio Bolsonaro. Bolsonaro has refused to concede defeat and has asked for the results to be annulled.

As grounds for cancelling the result, Bolsonaro pointed to a supreme court justice's decision to extend voting hours. His stance recalls that of his father, the former president Jair Bolsonaro, who four years ago also declined to acknowledge his loss to Lula. The elder Bolsonaro later attempted a coup and was convicted for it.

The Guardian's Tom Phillips, speaking overnight with a colleague in London, said the reaction was what they had feared but was unlikely to carry much weight. "The Bolsonaro response is exactly as I feared, but I don't think it will mean very much," Phillips said. World leaders are already recognising Lula's win, and Phillips does not think Bolsonaro has a hope of overturning the result.

Phillips described the victory as the "crescendo of an incredible, if sometimes controversial, 50-year political career". Lula is the first elected working-class leader of Brazil and has helped millions of people escape poverty.

Elsewhere, the West Bank city of Hebron, home to 250,000 people, has been sealed off by Israeli forces after a Friday gun attack on a military checkpoint that killed two Israeli soldiers. The neighborhood of Farsh al-Hawa, closest to the site of the attack, has been flattened. The Hebron municipality says 370 families, nearly 2,000 people, have been displaced, while the Israeli army has said the displaced population left voluntarily.

Hebron's mayor, Yousef al-Jabari, accused Israel of "collective punishment". "They have dragged people from their houses, and they have prevented the media from getting into the district," he said. He accused Israeli leaders of using Palestinian land to displace people for political goals. With elections looming in Israel, Palestinians in the occupied West Bank have no vote, though their lives will be deeply affected by the outcome.

In Lebanon, the 21-year-old photographer Zeinab Faraj was buried under rubble beside a dying colleague while reporting. "My heart stopped" as she heard a drone descending towards them, she said. The Israeli military later justified the attack by saying it had identified saboteurs violating the ceasefire, but human rights groups called it a war crime.

In Serbia, the long-serving leader Aleksandar Vučić has conceded defeat in a historic election against a student-led movement that had spent two years protesting against his government. Celebrations erupted on the streets of Belgrade as news spread that his 12 years in power had ended.

In the United States, the Alaska Senate candidate Mary Peltola suffered minor injuries in a car crash while driving to a campaign stop. Her family and the occupant of a second vehicle were taken to a local hospital with non-life-threatening injuries. Separately, Attorney General Todd Blanche has defended a pre-emptive Department of Justice lawsuit to block certification of Alaska's Senate results if the Republican incumbent, Dan Sullivan, loses. The suit alleges there could be "voter confusion" because two candidates named Dan Sullivan are on the ballot.