Three militant factions, including splinter groups of the Taliban, have separately claimed responsibility for the suicide attack that took place after the popular flag-lowering ceremony at Wagah in Pakistan.
Pakistan's Punjab government has said that the involvement of a "foreign hand" could not be ruled out in the Wagah Border suicide bombing, even after three homegrown militant factions separately claimed responsibility for the attack that killed at least 61 people.
At least 21 people, including a suicide-bomber, were arrested on Monday and explosives and a suicide vest recovered from Wagah border area as all of Pakistan was put on red alert after 61 people were killed in a deadly terror attack at the Indo-Pak land border crossing.
The death toll in the horrific suicide attack that shook Pakistan minutes after the popular flag-lowering ceremony at Wagah climbed to 61 on Monday. Security agencies have arrested about 20 suspects from the Indo-Pak border area.