A huge gas blast in the Kenyan capital, Nairobi, has killed at least two people and injured at least 222. A lorry carrying gas exploded in Embakasi district around 23:30 (20:30 GMT), "igniting a huge ball of fire", a government spokesperson said. Housing, businesses and cars were damaged with video showing a huge blaze raging close to blocks of flats. Earlier, the government had said the blast happened at a gas plant. The cause is still being established. Government spokesman Isaac Mwaura said the blast scene had now been secured and a command centre had been set up to help co-ordinate rescue operations. "Kenyans are hereby advised to keep off the cordoned area in order to allow the rescue mission to be carried out [with] minimal disruptions," he added. The blaze is reported to have spread through several apartment complexes, leading to fears the number of casualties could rise further. Witnesses told local media they had felt tremors immediately after t