Jammu and Kashmir Police Special Investigation Unit (SIU) conducted raids on houses of four Pakistan-based terrorists in various areas of Kishtwar district on Wednesday, a senior official said here. The raids were carried out in Padder, Keshwan and Thakrai after search warrants were obtained from a special NIA court in Jammu in a case under the Unlawful Activities (Prevention) Act, Senior Superintendent of Police, Kishtwar, Khalil Ahmad Poswal said.