A massive blaze has engulfed a 139-year-old mosque in the South African city of Durban. The cause of the fire on Monday at the Grey Street Mosque, one of the largest in the southern hemisphere, was not immediately known. But Faisal Suliman, chairman of the South African Muslim Network, said it was believed to have started in one of seven staff flats located above the mosque and may have been caused by an electrical fault. Durban – FIRE at a Mosque on Grey Street in the CBD area pic.twitter.com/iilkePxgex — Rob Beezy (@TrafficSA) August 24, 2020 Videos posted on Twitter showed crowds gathered as curtains of flames raged through the top floor of the two-storey building in the central business district of the southeastern port city. Several people took to social media to express sadness about the fire at the historic structure, which can accommodate up to 7,000 worshippers.