At least two persons were killed on Friday when a Yak-52 light aircraft crashed in Moscow region.The Moscow region's transport investigative committee said the plane failed to ascend and fell on the ground at noon near the town of Yegoryevsk , some 50 kilometres from the capital.Preliminary information showed that the plane was on a training flight over the Yegoryevsk.This is the fourth fatal accident with Russian aircraft in August. These accidents have claimed 10 lives so far.