One of the main perpetrators of the attack in Pahalgam, identified as Pakistani national Hashim Musa alias Suleiman, was active in Jammu and Kashmir for the last year and was likely involved in at least three attacks on security forces and non-locals, officials familiar with the probe said on Thursday.

Musa is believed to be hiding in the higher reaches of the Pir Panjal range, along with four other terrorists, who carried out at the attack on tourists at Baisaran meadow on Tuesday, the officials said.

These four terrorists were identified by the Jammu and Kashmir police as Ali Bhai alias Talha (Pakistani), Asif Fauji (Pakistani), Adil Hussain Thoker (a resident of Anantnag) and Ahsan (a resident of Pulwama). The police also released their sketches based on the details given by the survivors of the attack.

It is suspected that Musa may be working with other Pakistan backed terror groups operating in the Valley other than the Lashkar-e-Taiba.

As part of the probe, security agencies are looking for common links including the overground workers of LeT, who, in past one year, facilitated the travel of Pakistani terrorists from near the border to various districts of Kashmir, said an officer, who didn’t wish to be named.

Separately, the officer said, investigators are scouring cyberspace to identify people in the Kashmir Valley who came in contact with the LeT and its proxy, The Resistance Front (TRF), using encrypted apps in its plans to target non-locals. A second official said that some of these local residents and overground workers are already being questioned to know more about the attackers, particularly Musa.