Violent protests broke out in Tanzania’s biggest city, Dar es Salaam, on Wednesday during an election. President Samia Suluhu Hassan is expected to win following the disqualification of the leading opposition candidates.

Monitor group NetBlocks said internet service was disrupted across the country, as unverified videos of young protesters throwing rocks at security forces and a petrol station in flames circulated on social media.

Hundreds of protesters were marching towards the Selander Bridge that leads to Dar es Salaam’s centre, said a witness who asked not to be named.

The vote is being held without the leading opposition party, CHADEMA, whose leader, Tundu Lissu, is on trial for treason, which he has denied. The electoral commission disqualified CHADEMA in April after it refused to sign an electoral code of conduct.

The commission also disqualified Luhaga Mpina, the presidential candidate for the second-largest opposition party, ACT-Wazalendo, after an objection from the attorney general, leaving only candidates from minor parties taking on Hassan.