Telecom operators have been asked to explain in 15 days what action they have taken amidst an intense campaign of threats and abuse against several senior journalists, including NDTV's Ravish Kumar, over the last week. The Controller of Communication Accounts Uttarakhand Circle, an office under the Department of Telecom in the Ministry of Communications, has sent notices to nine cellphone carriers asking them to identify those behind the campaign and stop the misuse of telecom networks.