Former Union Minister M M Pallam Raju on Wednesday blamed the NDA government at the Centre for 'intelligence failure' that led to fierce clashes between Indian and Chinese troops in eastern Ladakh which left 20 Indian soldiers dead. Expressing concern over the outbreak of violence between the soldiers of two nuclear armed neighbours, he said, "We have lost lives and that means it is a very serious situation. What I feel sad about is that the build up (of Chinese soldiers) would not have certainly happened overnight. It would have taken some time. I feel it is an intelligence failure that we did not anticipate the build up," the Minister of state for Defence told PTI.