All the CNG stations in Sindh including Karachi will remain closed for 24 hours from 9 am on April 14 (today) till 9 am on April 15, 2012, under gas load management drive. According to an announcement of Sui Southern Gas Company (SSGC) here 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 season, SSGC said.