The Pakistan-based Islamist militant group (terrorist group) Jaish-e-Mohammed was responsible for this attack.They also released a video of the attacker, Adil Ahmad Dar. Dar was a 22-year old from Kakapora . He had joined the group a year ago. Pakistan denied any involvement with the group. But Jaish-e-Mohammed leader, Masood Azhar, roams freely in that country.