The Jharkhand State Pollution Control Board has cancelled the Consent to Operate (CTO) of Hindalco following the accident at the company's plant around 25 km from here, a Board official said on Thursday.
"We are constituting a four-member technical committee to study the design approved by IIT Mumbai and Roorkee, and whether the design was followed by the Hindalco. The four-member committee will include representatives of Mecon, ACMPDI, District Forest Officer (DFO) Ranchi and a Regional Officer of the Forest Department.
The district administration has sought details of mobile phones active in the area when the incident took place to ascertain the number of people trapped by the debris.
The removal of debris could only be started on Thursday morning as the approach road could not be constructed by the National Disaster Response Force (NDRF) team.
Protesting villagers stopped the NDRF team on Wednesday from constructing a path to the accident area. The villagers say that their cultivable land will become infertile if the debris is piled on it and are seeking compensation for damages.
The NDRF team launched the rescue operation on Wednesday amidst heavy security. The debris has spread over the area, including on railway tracks causing a threat to the environment.
Hindalco, however, has said that only four people were injured, and no there has been damage done to the environment.
Many people were feared trapped and swept away in the debris as the caustic pond suddenly broke up following a land cave-in at Muri, situated around 25 km from Ranchi.
According to local residents, the incident has taken place at the red mud store point which is left after manufacturing aluminium from bauxite.
According to an eyewitness, the heap of mud caved in, causing the debris to spread rapidly, following which many workers were trapped.
Hindalco was sealed in 2017 on the order of the pollution control board for not following the environment and safety rules. The plant was restarted last year.
Opposition parties have alleged that the relief work started late.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)