That's all from BBC Africa Live today. Keep up-to-date with what's happening across the continent by listening to the Africa Today podcast or check the BBC News website.

A reminder of today's wise words:

And we leave you with this picture of a man riding his bicycle leisurely past graffiti in the Tunisia's resort island of Djerba. It's one of our favourite pictures this week.

Image source, AFP

Zimbabwe’s governing Zanu-PF party launched its general election campaign today in the capital, Harare, ahead of polls which must be held by 21 August.

Party leader Emmerson Mnangagwa said if elected he will fight corruption, create jobs and steer Zimbabwe towards rejoining the international community.

Thousands of party supporters attended the launch and outside banners and billboards have been erected.

Image source, Shingai Nyoka/BBC

Image source, Shingai Nyoka/BBC

It is Mr Mngangwa's first election.

He was installed as leader of the governing Zanu-PF party - and de facto president - last year after then-President Robert Mugabe was ousted by a military takeover.

The BBC's Zimbabwe reporter Shingai Nyoka says there is an expectation that the polls will give President Mnangagwa an opportunity to step out of his predecessor's shadow.

The focus is squarely on the economy, she adds.

"Promises made in previous Zanu-PF manifestos to create 2.2m jobs didn't materialise. Zimabweans now want more focused and believable pledges."

Key allies of Emmerson Mnangagwa lost to relative novices in Zanu-PF nominations.

The party's chairwoman Oppah Muchinguri lost to Joyce Bukuta Hamandishe.

Christopher Mutsvangwa, the former leader of the war veterans who led protests last year calling on Robert Mugabe to step down, was also defeated.

It is not clear why they lost, our colleague Shingai says, adding that perhaps the party is turning over a new leaf.

Dickens Olewe
BBC Africa

The pace of technological development means that Africa often leapfrogs slightly older innovation to embrace the latest technology - fixed-line telephones and mobile phones are a good example.

Conversations about high-tech in Africa often throw up the words like "blockchain" and "artificial intelligence".

But these emerging technologies are causing some fears and concerns - recently the governor of Kenya's central bank called blockchain and Bitcoin a Ponzi scheme.

I spoke to Kenya's Minister of Information and Communications, Joseph Mucheru about AI, blockchain and other innovations:

A library in a deprived neighbourhood of Zambia's capital where many children are unable to go to school has become a haven for the more than 2,000 children who pass through its doors each week.

Lubuto Library, which is built in the traditional huts style in the shape of Insaka, is a beacon for education in an area with a high unemployment rate.

BBC Focus on Africa's Bola Mosuro visited Garden Township and met Daniel, a young boy who tells her life could have been different without the library.

A South African footballer has died two months after being struck by lightning while playing in a friendly game in March.

Top league side Maritzburg United confirmed the passing of 21-year-old Luyanda Ntshangase.

The club posted on its Facebook page about the "tragic" loss:

Correction 7 May 2018: This story has been amended to remove an incorrectly captioned photo

Chris Ewokor
BBC Africa, Abuja

Reports from Lagos say a woman has killed her husband and cut off his genitals.

Local police say the woman also attempted to take her own life but her neighbours intervened to stop her.

Both husband and wife are believed to be lawyers.

Police say they were alerted to the incident by a phone call on Thursday morning.

A team of detectives was mobilised to the scene where they found a man lying on the bed in a pool of blood.

Investigations revealed the killer, suspected to be his wife, had ripped out the man’s intestines with a knife, and severed his genitals.

The suspect is now receiving treatment at hospital.

Lagos police spokesman Chike Oti said the couple's three-year marriage had been fraught with domestic violence.

Image source, Laeïla Adjovi

Our colleague Laeïla Adjovi has won Senegal's prestigious Grand Prix Léopold-Sédar-Senghor for her photoseries called "Malaïka Dotou Sankofa".

She describes her motivation and the character she brought to life:

Image source, Laeïla Adjovi/Loïc Hoquet

Image source, Laeïla Adjovi/Loïc Hoquet

Image source, Laeïla Adjovi/Loïc Hoquet

She explains the meaning behind the character's name:

The images are accompanied by a poem:

Image source, Laeïla Adjovi

She was presented with the award by President Macky Sall at the DAK'ART Biennale of Contemporary African Art in Dakar.

Image source, Getty Images

Ivorian midfielder Yaya Touré will leave the Premier League champions Manchester City at the end of the season.

The 34-year-old will make his final appearance against Brighton on Wednesday, his manager Pep Guardiola said.

Touré, who joined City from Barcelona for a fee of around £24m in 2010, signed a new one-year contract in June 2017.

"Yaya came here at the start of the journey," said Guardiola. "Where we are now is because of what he has done."

"We cannot forget the period from Roberto Mancini, and especially Manuel Pellegrini, Yaya was the key player.

"The Brighton game we will give him what he deserves, one of the most beautiful farewells a player can receive.

"All the game will we be focused on winning for Yaya, we are going to try to do it for him."

City host Brighton on 9 May before travelling to Southampton for the final game of the season.

Touré has made 229 Premier League appearances in his eight seasons at Etihad Stadium.

He has won three league titles, an FA Cup and two League Cups in his time at the club but has made just nine league appearances this season.

Image source, AFP

The main opposition party in Madagascar is calling on the government to resign a day after the High Court ruled parts of a new electoral law are unconstitutional.

Supporters of opposition politician Marc Ravalomanana, who served as president from 2002 until he was toppled in a 2009 coup, say the new laws were intended to stop him from running in an election due later this year.

A top official from the former leader's party told reporters: "The logical consequence of this decision is the resignation of the government."

Mr Ravalomanana's supporters have occupied a square in the capital, Antananarivo, for a fortnight.

On Thursday, the defence minister and the heads of the security forces urged the government and the opposition to resolve Madagascar's political crisis.

A journalist with South Africa's news site eNCA has been tweeting about the aftermath of a tremor that hit the Sibanye Stillwater mine where three miners are trapped after an earthquake yesterday.

Erin Bates says the mine authorities have evacuated the rescuers.

But the body of one of the four miners who died is still underground, she adds:

A ground-breaking innovation in South Africa aims to drastically reduce waiting times for patients in need of medication for chronic illnesses.

The “ATM pharmacy”, as it’s been nicknamed by users, opened recently and is already proving popular.

Our colleagues have been to see how it works:

Video journalist: Christian Parkinson

A South African news site has tweeted that two tremors have hit a gold mine where three miners remain trapped after an earthquake on Thursday.

Rescue operations are still ongoing at the site but there hasn't been any report of the impact the tremors have had.

We reported earlier that four miners died after Thursday's earthquake caused a cave-in.

They were among 10 rescued from Sibanye-Stillwater's Masakhane mine, west of Johannesburg.

South Africa is a leading gold producer, but the industry has often been accused of a poor safety record.

Image source, AFP

Guinea's leader Alpha Condé wants to file a complaint against French investigators he accuses of “slanderous denunciation”, news agency Reuters reports.

The investigators are looking into allegations French billionaire Vincent Bolloré’s advertising agency - a subsidiary of his eponymous company - provided discounted communications advice to President Condé and Togolese President Faure Gnassingbé during elections in 2009 and 2010.

In return, the Bolloré Africa Logistics company was allegedly given licences to operate container ports in Conakry and Lomé.

All parties deny the allegations.

Mr Condé told news agency Reuters: "We have all the evidence proving that I did nothing except defend the interests of Guinea.”

He said he welcomed opposition calls for a parliamentary inquiry into how Bolloré obtained the concession to run the main port in Conakry.

Two rival firms have taken the Bolloré Group to court over the port contracts.

Mr Condé says France’s Getma International, whose contract was cancelled in favor of Bolloré, had not respected its contractual obligations.

Image source, Getty Images

Former Olympic 1500m champion Asbel Kiprop was tipped off by a doping control officer about a drugs test, but officials deny he was asked for money.

The Athletics Integrity Unit (AIU) confirmed the Kenyan, 28, tested positive for EPO after an out-of-competition test in November 2017.

The three-time world champion alleged his sample "turned positive" because he did not give the testers enough money.

That is rejected by the AIU, which said his sample was not tampered with.

However, the independent body which manages all doping-related matters for athletics said it is "extremely disappointing" Kiprop was provided with advance notice of the testing.

A tribunal will determine whether this has any effect on the case against the athlete.

Kiprop denied he has doped and said he paid the testers an unspecified amount of money via an electronic transfer and did not consider it untoward.

"At that time I did not see the money as an inducement or bribe," he said.

"I gave it in good faith thinking they may have some need known to them."

• Read the full story on the BBC Sport website.

One of the ways Nigeria has attempted to diversify its economy is by bolstering tourism.

Local travel operators are seeing an increasing number of Nigerians embracing holidays at home - even in urban areas.

The BBC's Ijeoma Ndukwe speaks to holiday-goers in Nigeria's commercial capital, Lagos.

The High Court of Tanzania has halted the implementation of new rules by the government requiring bloggers to pay $920 (£660) for the privilege of posting content online.

The new regulations were due to come into effect today. The court says it will explain on 10 May why it has issued the injunction.

A news site has tweeted the court document:

The application to oppose the regulations was made by human rights organisations, the media and popular Tanzanian blogging site Jamii Forums.

Tanzania's government says the regulations will protect the East African nation from "lies" being spread online. Critics see it as a way of muzzling freedom of expression.

• Read more: Licence to blog: Will 'Swahili WikiLeaks' have to close?

BBC World Service

The aid organisation MSF says that hundreds of migrants and refugees - including women and children - are being held in a dangerously overcrowded detention centre in Libya.

MSF says that many have been held for more than five months in the port city of Zuwara in western Libya.

The group says that they are kept in inhumane conditions without adequate food or water.

It says that more than 500 people have been detained in the past two weeks alone, far exceeding the centre's capacity.

Burundi's government says BBC and VOA broadcasts will be banned for six months from 7 May for "falling short of laws governing the press" and "breaching professional ethics".

It accuses the BBC failed to challenge a Burundian activist interviewed on its French service.

The BBC broadcasts to Burundi on FM relay stations and on two local partner stations.

A local news site has tweeted a copy of the statement:

The country is gearing up for a referendum vote on 17 May, which could extend the rule of President Pierre Nkurunziza until 2034.

Human Rights Watch says Burundi government forces and members of the ruling party have killed, beaten and intimidated people they regard as opponents of the poll.

The US State Department recently said the vote could hurt Burundi's democratic institutions.

A number of private radio stations have been destroyed and shut down in Burundi during a political crisis which began in 2015, when President Nkurunziza won a controversial third term in office.

Since then, nearly 430,000 people, including opposition politicians, have fled Burundi.

Authorities in Kenya say four people were killed on Thursday night by al-Shabab militants in a quarry in the northern border town of Mandera, news agency AFP reports.

The assailants shot and hacked the victims who are said to be non-Muslims.

The regional police boss Mohamud Saleh said an operation had been launched to pursue the attackers.

"We suspect al-Shabab and we are pursuing them," he is quoted as saying.

A police source told AFP that 10 assailants took part in the attack, adding they "opened fire indiscriminately at the workers" in the quarry.

The source said several others were injured.

The national police boss Charles Owino said security services had information about an impending attack and had beefed up security but "no-one knew exactly where".

The report says that the militants are now believed to have crossed the border into neighbouring Somalia.

Al-Shabab militants have attacked the Mandera several times, a situation that is forcing residents - mostly-non Muslims - to flee the area.

• Read more: Who are Somalia's al-Shabab?

BBC World Service

Image source, AFP

The president of Mozambique has urged people to do everything they can to keep the peace process on track, following the death of the opposition leader Afonso Dhlakama.

President Filipe Nyusi said Mr Dhlakama had been working hard to restore peace between his movement Renamo and Mozambique's government.

Hundreds of armed Renamo supporters remain in the bush, where Mr Dhlakama lived for several years prior to his death on Thursday.

Analysts say it is unclear what will happen to them now, as power was concentrated in the hands of Mr Dhlakama.

Renamo fought a 15-year civil war against the government which ended in 1992.