A BBC investigation has discovered that political parties in Nigeria are secretly paying social media influencers to spread disinformation about their opponents ahead of general elections in February.
The BBC's Global Disinformation Team has spoken to whistle-blowers working for two of Nigeria's political parties, and prominent influencers who have described it as "an industry".
The whistle-blowers say parties give out cash, lavish gifts, government contracts and even political appointments for their work.
We changed their names to protect their identity. "Yemi" is a prominent strategist and "Godiya" a politician.
"We've paid an influencer up to 20m naira ($45,000; £37,000) for delivering a result. We've also given people gifts. Other people prefer to hear: 'What do you want to do in government, be a board member, be a special assistant?'," says Godiya.
Situation rooms are commonplace in the run-up to an election. It's where political parties strategise, develop plans and monitor their campaigns' success. But in the rooms the whistle-blowers described to us, there was another function: following how false narratives assigned to influencers were performing.
Strategist Yemi says fake stories are developed to improve their candidates' chances: "You can deliberately misinform in a suitable way for you."
The BBC has spoken to multiple influencers who have confirmed that payment in exchange for false political posts is widespread.
One influencer who asked not to be named - with almost 150,000 Facebook followers - told us he is paid by political parties to post completely false stories about political opponents. He says he does not do it openly but rather plants false stories through other micro-influencers he hires.
Separately, Rabi'u Biyora is a major influencer known for supporting the governing All Progressives Congress (APC) party.
He told us he was "wooed" by an opposition party to stop promoting the APC's candidate, and give his support to their candidate instead.
Posts on his Facebook timeline confirm he did just that. He told us he did not receive gifts of any kind to do so. But we discovered a Facebook post from 2019 in which he said he received a car and money from a party in exchange for his support on social media.
We put this finding to him, but he stopped responding to us.
With an estimated 80 million Nigerians online, social media plays a huge role in national debates about politics. Our investigation uncovered different tactics used to reach more people on Twitter. Many play on divisive issues such as religious, ethnic and regional differences.
In July, influencers widely shared posts associating Kashim Shettima, the APC's candidate for vice-president, with members of the Islamist militant group Boko Haram.
This false narrative gained momentum on Twitter and was shared thousands of times, spilling onto WhatsApp and other platforms.
Using reverse image search, we found that those in the picture with Mr Shettima were nomadic Fulani parents whose children he had enrolled in secular schools in 2017, not members of Boko Haram.
A month later, influencers promoted a claim without evidence that Labour Party presidential candidate Peter Obi was linked to, and following orders from, the Indigenous People of Biafra (Ipob) - a separatist movement designated in Nigeria as a terror group. His party denies this.
Those who shared this information included Reno Omokri - special assistant to former opposition President Goodluck Jonathan - who has more than two million followers on Twitter.
When approached for a comment, Reno Omokri said he stands by his accusations, but insists he has not been paid by the main opposition People's Democratic Party (PDP) to campaign on their behalf.
Meanwhile, false claims that the PDP presidential candidate, Atiku Abubakar, fell ill and was rushed out of the country have been shared several times on Twitter.
Godiya, the politician we interviewed, says political parties tell influencers to elicit as much emotion as they can with their paid posts.
"We use images that may not even be relevant to the story we are trying to spin. We can take pictures from East Africa in the 1990s in warzones and attach them to a tweet about how my ethnic group is being killed. When people get emotional they retweet, they like, and it gets traction," she says.
According to the whistle-blowers, the hired influencers are sometimes given an idea that they should frame in their own words. At other times, they are given the actual tweets that need to be published at specific times.
They say influencers are paid based on the number of followers they have. They also say payment happens mostly in cash to avoid a paper trail.
It is not illegal for political parties to hire social media influencers in Nigeria, but spreading disinformation on social media is a breach of the country's laws and Twitter's policy.
The BBC has asked Nigeria's main political parties, APC, PDP, and the Labour Party, about the whistle-blowers' allegations. They did not reply to our request for comment.
In response to our findings, Twitter has taken down some of the accounts we reported to them and said it had a responsibility to protect electoral conversations from interference, manipulation, and false information.
However, there are concerns about the platform's capacity to tackle misinformation in Africa after Elon Musk's takeover of the company, when its continental headquarters in Ghana was closed and nearly all its staff fired.
The BBC has reached out to Twitter again after these changes, but received no response.
Idayat Hassan, director at the Centre for Democracy and Development, says the activities of these influencers amounted to "political interference".
"It is undermining trust in democracy, undermining trust in the electoral system, and it is instigating conflict," she says.
But politician Godiya sees it a different way, and defends the tactic: "It is a game. Somebody had to win, and God help me, I will not be on the losing side."