A fire at a grid substation at Ulon in Rampura area led to blackout in vast areas of the city’s southern part.   According to official sources at Power Grid Company of Bangladesh (PGCB), the fire broke out at the 132/33 kV grid substation around 4pm, but it was not clear what caused the fire.   Soon after the incident, several units of Fire Service and Civil Defence rushed to the spot and brought the fire under control at about 4:50pm, the sources said.   A PGCB official informed that electricity supply in the city’s Motijheel, Rampura, Jatrabari, Lalbagh and Dhanmondi areas was severely disrupted following the fire.   “We’re trying to restore the electricity supply to the areas through alternative means,” a PGCB official told UNB.   He, however, said the substation was recently handed over to Dhaka Power Distribution Company (DPDC).    “But still both the PGCB and DPDC officials were jointly operating the substation,” he said.