All the CNG stations in Sindh province will remain closed on Thursday, August 2, from 01:00pm to 09:00am on Friday, August 3, for 20 hours due to gas shortage. The SSGC spokesperson on Wednesday said the utility was facing shortage of about 35mmcfd gas due to annual scheduled maintenance of Amzama Gas Field started from Monday. This field adds about 205mmcf gas daily to the SSGC's system.