Links:
[1] http://admin.indiaenvironmentportal.org.in/news/ongc-caps-leaking-gas-well
[2] http://admin.indiaenvironmentportal.org.in/category/newspaper/assam-tribune-guwahati
[3] http://admin.indiaenvironmentportal.org.in/category/thesaurus/gas-leakages
[4] http://admin.indiaenvironmentportal.org.in/category/thesaurus/oil-and-natural-gas-corporation-ongc
[5] http://admin.indiaenvironmentportal.org.in/category/thesaurus/west-tripura