Srinagar, June 21 -- Cross-border drones successfully dropped arms and ammunition as deep into Kashmir as the Baramulla district without detection, according to a National Investigation Agency (NIA) chargesheet filed in the last year's audacious Pahalgam terror attack case.

The exhaustive NIA probe has tracked the pre-attack movements of the terrorists who struck the popular Baisaran meadows in Pahalgam in April last year. The terror attack resulted in the death of 26 people, the majority of whom were tourists.

In response to the attack, Indian armed forces launched Operation Sindoor in which terror infrastructure across the border were destroyed.

Security experts analysing the chargesheet point to a critical drop in human intelligence g...