To deal with the rebels, Imperial Commissioners Agui and Heshen were sent to Lanzhou. Unable to dislodge the Salars from their fortified camp with his regular troops, Agui sent the "incompetent" Heshen back to Beijing, and recruited Alashan Mongols and Southern Gansu Tibetans to aid the Lanzhou garrison. After a three months' siege of the rebel camp and cutting off the Salars' water supply, Agui's joint forces destroyed the Jahriya rebels; Su and all his fighters were all killed in the final battle. Overall, it is said that as much as 40% of their entire population was killed in the revolt.