The Special Investigation Unit (SIU) of Jammu and Kashmir Police on Tuesday carried out raids at the houses of four militants, who are operating from across the border and making efforts to revive militancy in Kishtwar district, a senior police officer said. The raids were carried at Mughal Maiden, Chatroo and Singhpora at the residences of militants Jamal Din, Gulzar Ahmad, Shabir Ahmad and Gulab operating from Pakistan.