Thousands of Soviet jet fighters, helicopter gunships, and air transports in Kabul, Afghanistan, over the weekend engaged in what one Western diplomatic source calls "the largest display of aerial activity since the December 1979 invasion."
Other sources reported heavy fighting in the besieged Afghan capital.
One unconfirmed report said the 14th Afghan Division of 10,000 regular Afghan troops stationed in Gazni have revolted and were fighting Soviet troops stationed "very close" to the 14th Division.
If so, it would signify the defection of about one-third of the troop strength of the Afghan Army, estimated at 80,000 to 100,000 before the Soviet invasion last year.
The sources said the heavy air activity to and from the southwest indicated that Soviet officers had rushed reinforcements to Gazni to deal with the uprising.