In the chargesheet, the anti-terror agency charged Pakistan-based Saeed in his individual capacity and also as chief of the banned LeT and its active proxy organisation, The Resistance Front (TRF).
Officials familiar with the probe said Indian agencies have noted increased interactions between Hamas and Pakistan-based terror outfits, including LeT and Jaish-e-Mohammed, in recent months.
According to the charge sheet, TRF claimed the Pahalgam attack hours after it occurred and withdrew the claim three days later. Both social media posts were traced to Pakistan-linked TRF handles.
The attack is considered one of the deadliest attacks on civilians in recent years. The attackers targeted victims after identifying them by their religion.