SUDANESE fighters have seized a major biolab containing polio and measles samples in an “extremely, extremely dangerous” situation. World Health Organisation (WHO) chiefs have sounded a major alarm after the militia group seized the lab in the capital Khartoum. ReutersSmoke is seen rise from buildings during clashes in Khartoum[/caption] WHO chief Nima Saeed Abid said: “There is a huge biological risk associated with the occupation of the central public health lab… by one of the fighting parties.” Scientists have been for years warning about the danger of a virus or pathogen being released from a poorly managed biolab – especially in the wake of the pandemic. The situation in Sudan is devolving into chaos amid fighting between warring groups – with the capital being devastated by gun battles and airstrikes. It is unclear exactly which lab the faction has seized, but Khartoum is home to the National Public Health Laboratory. WHO said the captured facility has samples of diseases including polio and measles. And the release of such a pathogen amid the ongoing chaos could be devastating amid the unfolding carnage. It comes as Britain has launched a daring mission to rescue some 4,000 citizens from the war-torn nation. The first RAF transport plane carrying rescued Brits took off this morning from a military airfield around 20 miles outside Khartoum. British forces are trying to operate in a narrow 72-hour ceasefire window brokered by the US. There is the constant fear that such fragile peace could collapse at a moment’s notice and catch Brits in the crossfire. Teams of special forces are expected to secure safe routes out for UK citizens – before passport holders are then called to the airfield. Some 1,400 UK military personnel are understood to be involved in the operation – possibly alongside ships from the Royal Navy. Prime Minister Rishi Sunak confirmed the “large scale airlift” is being undertaken to rescue trapped Brits. The ceasefire between Sudan’s warring generals came into effect on Tuesday. The country has been rocked by 10 days of urban combat which has killed hundreds, wounded thousands, and sparked a mass exodus of foreigners. The United States and European, Middle Eastern, African and Asian nations launched emergency missions to bring to safety their embassy staff and Sudan-based citizens by road, air and sea. But millions of Sudanese are unable to flee what is one of the world’s poorest countries, with a history of military coups. They are trying to survive acute shortages of water, food, medicine and fuel as well as power and internet blackouts. And the added biohazard danger adds a further complication.