Watch: Joy and disbelief on Serbian streets as Vučić concedes election defeat

Serbia's long-standing leader Aleksandar Vučić has admitted defeat to a student-led protest movement in snap parliamentary elections.

Celebrations erupted as crowds descended on the centre of Belgrade, Novi Sad and other cities.

The student movement was formed less than two years ago in response to a railway station disaster blamed on corruption and negligence, but fought the election with candidates from a cross-section of Serbian society.

"It is clear we have lost these elections," right-wing populist leader Vučić said as he conceded. With 97% of polling stations counted, Serbia's election commission said the students had won 2.24 million votes and the former ruling party 1.67 million.

The students had secured 52.6% of the vote, while Vučić's Serbian Progressive Party (SNS) was on 39.2%, according to its preliminary figures late on Monday morning.

Vučić had spent two terms as president and could not seek a third term, so was leading his Serbian Progressive Party (SNS) with the aim of returning to the post of prime minister, which he left in 2017.

He called the snap elections after two years of protests triggered by the collapse of a canopy in front of Novi Sad station which killed 16 people.

Vučić said early results made it "clear" that his party had lost

The Student List's lead candidate Ilija Srdanović told BBC Serbian: "This will be a free state."

He said the anti-corruption movement, which had attracted anti-government voters across Serbia, hoped to "free the country from tyranny".

There were celebrations on the streets of the city, with people dancing and chanting "victory", cars honking, and fireworks set off. "Serbia is free," one student told the BBC. "It's a miracle."

How a movement of students brought down Serbia's Vučić

During a celebration speech, Student List candidate Radomir Saicic said Serbians had shown "no obstacle was greater than their will", Reuters reported. "No force can forever overpower a people who have decided to take their destiny into their own hands," he added.

Amid scenes of people dancing in the streets Belgrade, Selena Lebovic said the result was "really fabulous".

"We are all crying, and what to say. We couldn't believe that it would be so easy," she told Reuters.

An aerial photo shows the size of the celebrations by Students' List supporters at Slavija square in Belgrade

Vučić made his announcement at the headquarters of his Serbian Progressive Party (SNS) in the capital Belgrade.

The centre of Novi Sad - the northern city that triggered the student-led protests - was crowded. "Everything is going to get better now," David Vasić, one of those celebrating, told BBC Serbian.

The Student List - which has no obvious leaders and whose members are not used to politics - had attracted anti-government voters across Serbia.

It decided to field candidates to the 250-member parliament from across Serbian society including doctors, actors, academics and sports personalities.

"This is not an ordinary election victory, this is an avalanche that has wiped out an authoritarian regime and entire political scene," said Nebojša Vladisavljević, professor of political science at the University of Belgrade.

There were now two big political groups in Serbia, and the Student List had "absolute legitimacy" to govern for the coming years, he told BBC Serbian.

The anti-corruption movement campaigned on a manifesto that included purging officials who broke rules cracking down on protesters, stopping party loyalists from leading public enterprises, and freeing the public broadcaster of political control.

Vučić and the SNS party have repeatedly denied corruption.

Vučić, who backed Serbia's candidacy for the European Union while refusing to impose sanctions on Russia over its full-scale invasion of Ukraine, had pledged to increase pensions and public sector salaries, and investment in state healthcare.

Kremlin spokesperson Dmitry Peskov praised Vučić's contribution to relations with Russia and hoped "the new political force" in Belgrade would understand that co-operation with Moscow was in Serbia's interests: "But, as you know, it takes two to tango."

His defeat was welcomed by Hungary's prime minister, Péter Magyar, who said he was delighted to hear from the Student List's leaders "how much strength our victory in April had given them". Magyar's party ended 16 years of Viktor Orbán rule, while Vučić's SNS party had been in power since 2012.

Ilija Srdanović, Student List's leading candidate, pictured during celebrations late on Sunday

European Commissioner for Enlargement Marta Kos said "a new chapter can begin for Serbia. The door to the EU is open, and we are ready to move forward together".

Earlier in the day, long queues were seen outside polling stations in cities and towns across Serbia.

This was also the case outside booths in a number of countries with sizeable Serbian communities - including Slovenia's capital Ljubljana, Germany's Munich, and Los Angeles and Chicago in the US.

In France, Serbian voters waited in line in heavy rain in Paris.

The election was held amid high tensions across Serbia, with police sealing off streets around the Republic Electoral Commission (RIK) in Belgrade.

Attention will now turn to who will lead the Student List as prime minister. Presidential elections are due to take place in December, with parliament speaker Ana Brnabić currently filling the role in a caretaker capacity.