SRINAGAR, Feb 24: The National Investigation Agency (NIA) on Saturday attached houses of four accused in a narco-terror case in Jammu and Kashmir’s Kupwara district, the agency said.The case relates to the use of the ”proceeds of narcotic drugs” to fund violent terror activities by proscribed terror groups Lashkar-e-Taiba (LeT) and Hizbul Mujahideen (HM) operating