All CNG stations in Sindh including Karachi will remain closed for 24 hours from 9.00 am, on Saturday till 9.00 am, on Sunday, under gas load management. According to an announcement of Sui Southern Gas Company (SSGC) on Friday, this step is being taken by the gas utility to improve the line pack position all over its franchise area, which has been badly disturbed due to increased domestic gas load during the current winter season, SSGC said.