India, June 24 -- The Assam Pollution Control Board (PCBA) has issued a show-cause notice to Oil and Natural Gas Corporation (ONGC) for operating their activities in Sivasagar district without proper environmental clearances following the natural gas leak from ONGC's Rudrasagar oilfield that began on June 12.

Nearly 350 families were shifted to other places after authorities failed to control the situation after the gas leak, prompting chief minister Himanta Biswa Sarma to suggest the company seal the well permanently.

A special team from the United States was called, and the team reached Assam last Friday. The ONGC authorities on Sunday informed them that the flow of the gas leak has been slowed down, and additional machines have been ...