While the federal government has asked Hydro-Carbon Development Institute of Pakistan (HDIP) for PC-1 of the public CNG filling stations to be set up in the city, the private sector is also keen to supply CNG for the proposed 500 CNG buses at discount rate.
Links:
[1] http://admin.indiaenvironmentportal.org.in/news/cng-bus-project-private-sector-keen-supply-cng-discounted-rate
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/business-recorder-pakistan
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/cng-buses
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/pakistan
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/karachi