Ike Ekweremadu, 60, his wife Beatrice, 56, daughter Sonia, 25, and a doctor, Obinna Obeta, 50, are accused of conspiring to exploit the man for his body part.
The United States and NATO have called the pipeline attacks "an act of sabotage," while Russia has blamed the West and called for an independent investigation. Neither side has provided evidence.
The fighting continued on Tuesday, with the rebels seizing new villages, despite a ceasefire brokered by Angola last week that was due to start at noon.
Russian President Vladimir Putin has branded the saboteurs as "terrorists" and urged his security services to bolster defences along the frontier.
The breakdown, which appeared fixed in less than an hour, comes as the Elon Musk-owned social media giant was trying hard to stabilize after several rounds of layoffs saw more than two thirds of staff let go.
Lesotho's deputy prime minister Nthomeng Majara was among leaders to call for an "urgent" rescheduling or writing off debt.
Britain's government will announce on Tuesday plans for a new law barring those entering the country through unofficial routes from claiming asylum, in a bid to stop tens of thousands of migrants arriving on its shores in small boats.
Election observers from the European Union, the Commonwealth and other bodies reported a range of problems, among them failures in systems designed to prevent vote manipulation.
Hundreds of migrants have flown home from Tunisia, fearful of a wave of violence since the president's remarks.
Ukraine's top military commanders have vowed to keep defending the besieged city of Bakhmut, where Russia is hoping to make its first major wartime gain in more than half a year, and will strengthen their defences, President Volodymyr Zelenskiy said.
The Tutsi minority has long faced discrimination in Democratic Republic of Congo due to their ethnic link to Rwanda's Tutsi community.
Sixteen states in Nigeria had brought the case to the court, arguing that Most Nigerians were stuck with old notes and needed more time beyond the Feb. 10 date
Wearing a t-shirt with the slogan 'Rwanda Is Killing,' activist Tonny Djoli said France was turning its attention to Central Africa because of a breakdown in relations with former West African colonies.
Macron landed in the Congolese capital Brazzaville just before 5 pm (1600 GMT), on the third leg of his voyage after visiting Angola and Gabon.
Without evidence, the Tunisian president accused migrants of causing a wave of crime and plotting to change the country's demographic make-up.
Saied claimed that migrants were behind most crime in the North African country, fuelling a spate of sackings, evictions and attacks.
Meanwhile French President Emmanuel Macron, visiting the country on the last leg of his African tour aimed at renewing frayed ties, said that all sides would support a ceasefire in the fighting.
Radio journalist Martinez Zogo, who was kidnapped and brutally murdered in January, was outspoken against graft and financial sleaze and had often faced threats over his work.
The U.S. and allies have been flooding Ukraine with weapons from Javelin missiles to HIMARS rocket launchers, but sophisticated jets and the largest armed drones have not been pledged to Ukraine by Western allies.
Ukraine has vowed to defend "fortress Bakhmut" which Russian troops seem determined to take. Analysts say the city, which has been virtually destroyed in the fighting, has little real strategic value.
Thousands of people have come to seek help, either for themselves or for a loved-one, from a 20-year-old woman named Adja whose reputation for healing powers has spread across the country.
The Kremlin meanwhile warned the West against providing more arms to Ukraine, as key Kyiv backers President Joe Biden and German Chancellor Olaf Scholz were set to meet in Washington.
Macron said France harboured no desire to return to past policies of interfering in Africa ahead of an environment summit in Gabon, the first leg of his trip.
Tinubu, a former Lagos governor of the ruling All Progressives Congress (APC), was declared winner of Saturday's election with 8.8 million votes and the required number of ballots across two-thirds of Nigeria's states.
Last week, the European Union adopted the tenth package of sanctions targeting Russia, but did not include its nuclear energy sector because of opposition from some EU member states.
The main opposition candidate, Atiku Abubakar, who came second with 29% of the vote, also said later in the day that he would challenge the result in court as fraudulent.
Ukraine accused Russia of staging a false "provocation", but also appeared to imply some form of operation had indeed been carried out by Russian anti-government partisans.
Russia's failed attempt to swiftly capture the capital left at least 1,370 dead civilians before the Ukrainian army pushed them back, according to Ukrainian officials.
In a statement, Binance said that "a lot of misinformation has been spread about our company" but that "we appreciate the senators' request" and that it will provide information to help them better understand the firm.
When pressed by Wiles as to whether the SEC believed that the Voyager sale violated U.S. securities laws, SEC attorney William Uptegrove did not have a definite answer.
