Throughout 4 and 5 December, IAF concentrated in attacking the aircraft on the ground. But, it failed to cause significant damage to the PAF assets in well-dispersed and camouflaged locations. By the evening of 5 December, the IAF changed tactics. On the morning of 6 December four MiG-21s (No. 28 Sqn), flying from Gauhati hit Tejgaon with 1000lber, scoring several hits on the runway. Kurmitola was attacked on the morning of 7 December, when Mig-21s of No. 28 Sqn again hit the runway. No. 7 Sqn was pulled out of the eastern ops on 6 December to help the Indian Army in the west. Repeated attack by MiG-21s and Hunters of No. 14 and No.28 however, kept the runway cratered. The IAF assault effectively grounded the PAF by 7 December, and No. 14 Squadron was taken out of the war. The IAF also bombed other airfields including the abandoned WWII airfields of Comilla, Lalmanirhat and Shamsher Nagar through the war, denying their use to PAF.