In fact, those in charge of the chief minister’s security are hard-pressed to explain how the landmines went undetected when at least three anti-sabotage checks are done on any route taken by Naidu. The last of these checks is carried out two to three hours before the VVIP convoy is scheduled to pass by. The mines were planted within a few hundred yards of the Allipiri police station, which speaks of a lowering of guard or sheer complacency. An official inquiry has been ordered into the security lapses under S. Subramanyam, a retired police officer who is the security advisor to the state government.