Logistical problems have delayed voting in Uganda’s presidential and parliamentary elections in many parts of the country amid an internet shutdown.

The BBC observed growing frustration among voters queuing at some polling stations in the capital, Kampala, in the morning, although voting does now seem to be under way in most areas.

The delays of up to four hours have been blamed on failures of biometric identification kits, which some have linked to the network outage, as well as a lack of equipment in some places.

The electoral agency has apologised for the “technical glitches” and said officials were working to resolve them.

In the presidential race, Yoweri Museveni, 81, in power since 1986, is seeking a seventh successive victory as he faces a challenge from Bobi Wine, a charismatic 43-year-old pop star.

Where voting has been taking place, there are reports that the biometric machines used to verify voters’ identities are still malfunctioning in some areas.

Delays were also caused by polling materials and equipment not arriving at some stations on time.

“I’m angry because I have not voted up to now. We are meant to start at seven, but up to now we haven’t started. The ballots papers are not even there, I don’t even know what to say,” Kaweesi Ismail, a voter in Kampala, told the BBC.

Some people are reported to have left polling stations without voting, saying they could not wait for the technical problems to be resolved.

The problems appear to have affected both areas seen as pro-government as well as those seen as opposition strongholds.

Casting his vote in his native Rwakitura Village in the western Mbarara region, Museveni said he had also experienced difficulties.

“I put my thumbprint on the machine but it did not accept it. However, my face was accepted instantly by the machine. The machine works,” he said.

Asked if he would accept the election outcome, the president said: “This is one of the manipulations – we have to find out why, what was the problem?”

“We are now verifying whether this was deliberate,” he added.

In a post on X, Wine said the biometric machines “have failed everywhere”, alleging widespread irregularities and the arrest of his agents as voting got under way.

Election chief Simon Byabakama ordered the use of the national voters’ register where biometric machines failed to function.

The country’s law allows polling hours to be extended if challenges disrupt the voting process, however the commission did not explicitly say whether polling hours would be extended.

Byabakama did say that all registered voters in the queue by 16:00  local time (13:00 GMT) would be allowed to cast their ballots.

The presidential poll is essentially a two-horse race between Museveni and Wine, but given the president has won the six previous elections, analysts say he is likely to further extend his time in power.

Wine has promised to tackle corruption and impose sweeping reforms, while Museveni argues he is the sole guarantor of stability and progress in the country.

The result of the presidential vote will be announced by 16:00 local time (13:00 GMT) on Saturday, the electoral commission has said.

The campaign period was marred by the disruption of opposition activities – security forces have been accused of assaulting and detaining Wine’s supporters.

Police spokesperson Kituuma Rusoke dismissed these complaints, accusing opposition supporters, particularly those belonging to Wine’s National Unity Platform (NUP) party, of being disruptive.

Internet access was suspended on Tuesday, with Uganda’s Communications Commission saying the blackout was necessary to prevent misinformation, fraud and the incitement of violence – a move condemned by the UN human rights office as “deeply worrying”.

The NUP has rejected this explanation, accusing the regulator of trying to stop the opposition from mobilising and sharing evidence of election fraud. The party has launched an offline vote-monitoring app in case of a blackout.

The app, called Bitchat, uses Bluetooth technology to share images of the results forms from polling stations and voting data without internet access, according to Wine.

The former leader of a guerrilla army, Museveni has benefitted from two constitutional amendments – removing age and term limits – that have allowed him to keep running for office.

Wine, real name Robert Kyagulanyi, lost to the president in the 2021 elections, although Wine dismissed the results, alleging fraud.

Alongside Museveni and Wine, six other presidential candidates are on this year’s ballot papers.

Voters will also chose a new parliament, with 353 seats up for grabs.

For many of those voting on Thursday, the economy is the key issue.

The majority of the population is under 30 and although the average income is steadily rising, there are not enough jobs for all the young people looking for work.

There are also concerns about poor infrastructure and disparities in access to quality education and healthcare.

During the campaign period, opposition supporters have faced escalating harassment, including arrest on politically motivated charges, according to both the United Nations and Amnesty International.

Wine’s rallies, unlike those of Museveni, have been disrupted by security forces.

Amnesty has described the use of tear gas, pepper spray, beatings and other violent acts as “a brutal campaign of repression” ahead of the vote.

In addition, the head of Uganda’s electoral body told the BBC he has received threats warning him against declaring certain results.

Additional reporting by Wedaeli Chibelushi