A bench headed by NGT Chairperson Justice Swatanter Kumar noted that there were "serious" inconsistencies between the report submitted by the DM and that prepared by the members of a committee constituted by the green panel to probe the matter.
In a detailed judgement, the NGT had banned illegal extraction of minor minerals through mechanised mining in Gonda and Faizabad districts of Uttar Pradesh and ordered a probe into the unauthorised activities there.
"In light of the above the presence of DM is necessary. Let him appear before the tribunal positively, on the next date of hearing," it said.
The matter is fixed for hearing on September 6.
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The green panel had ordered that there should be no mining activity within 50 metres from the end of the railway track on Mankapur in Faizabad and 150 metres from railway or any other bridges.
The bench said that mechanical extraction of minor minerals in large quantity near the railway track was bound to endanger not only the environment and ecology of that area but also enhance the chances of collapsing of the track.
The green body had also directed the panel to investigate the role of former UP minister Vinod Kumar Singh and his brother Narendra Singh while conducting the probe and state whether they have any role in illegal mining activity or not.
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