There are calls from the US and Britain for an investigation after Ukrainian soldiers of the Azov regiment were reportedly injured by a "poisonous substance" during a Russian attack on the port city of Mariupol. No evidence has yet been gathered. The UK foreign secretary says it would be "a callous escalation" of the war. The Pentagon says it's "deeply concerning". Ukraine's President Volodymyr Zelensky has already expressed his fears that Russia could deploy chemical weapons in his country.

This week on The Observers, we investigated an incident in Nia Ouro, Mali on January 4. Residents claimed that men dressed in Malian military uniforms killed four civilians and reduced buildings in the village to ashes. We spoke to an eyewitness, analysed videos taken after the event and cross-referenced satellite imagery to put together the days events.

'People' reports that Kanye West has been named as a suspect in a battery report from an alleged physical altercation in Los Angeles. According to 'People,' an LAPD source said that the alleged incident took place early on the morning of January 13.

South African President Cyril Ramaphosa is waiting for the full release of the Zondo report before responding to its findings on state corruption. The first instalment of the investigation accuses former president Jacob Zuma of having encouraged graft by his closest allies during his time in power. Meanwhile in Tunisia, several critics of President Kais Saied are on hunger strike, denouncing unlawful arrests. Finally, preparations are in full swing in Cameroon's city of Bafoussam ahead of the Africa Cup of Nations.

Simon Case was leading the probe into alleged Christmas parties held by Prime Minister Boris Johnson's staff in breach of COVID restrictions. Case has quit after reports of parties in his own office.

US media reports that Trump National Golf Club's finances are under scrutiny, with a probe launched into whether it has misled a valuation for tax purposes.

Nazi memorabilia and weapons valued at around €3 million have been found by police in Rio de Janeiro. The hoard was found during an investigation into a suspected raping of a minor.

Madagascan police this week arrested six people, including a foreign national, on suspicion of plotting to kill the president, after months of investigation, officials said on Thursday.

FBI agents assisting the investigation of the assassination of President Jovenel Moise are seen leaving his residence in Port-au-Prince.

Piers Morgan has revealed the Metropolitan Police visited his house last night (17.02.21) to take a statement after he and his son Spencer Morgan were hit with death threats earlier this week.

Reps. demand police investigation into recent violence in Oyo State

Roger Lumbala has been accused of "complicity in crimes against humanity" for his actions during the civil war in the Democratic Republic of Congo in 2002.