In a letter to Singh, they have also raised security concerns as the jammers could be used to disrupt signals of facilities being used by the government.
"We would like to bring to your kind attention our serious concern in relation to the illegal use of jammers. We demand your intervention in the issue to ensure that immediate action is initiated against this illegal activity and the persons involved in the same," DTH Operators Association of India President Harit Nagpal said in a letter to Singh last week.
"This is a clear violation of the Wireless and Telegraph Act 1933 under which possession and use of unauthorised equipment and interference with transmission of authorised signals is illegal. We have raised this issue in the past too when similar occurrences took place in Noida (UP) in 2011 and Mumbai in 2008 and then again in 2012," the letter said.