Two top Ulfa leaders have surrendered to the Border Security Force (BSF) in Tripura and will be handed over to Assam police soon, a top BSF official said yesterday.

Self-styled Ulfa Foreign Secretary Sashadhar Choudhury and Finance Secretary Chitraban Hazarika surrendered at Gokulnagar along the Indo-Bangla border in Tripura on the night of November 4 and 5.

The two were reportedly trying to enter India when they were spotted by the BSF troops and asked to surrender, the official said.