A Punjab Rangers official said that explosives and a suicide jacket had been found during a search operation in the area. "The suicide vest stuffed with explosives and ball bearings has been defused by the bomb disposal squad," he said.
The law enforcement agencies arrested 20 'suspects' from the Wagah border areas during the search operation. Lahore police spokesman Niyab Haider Naqvi told PTI that the law enforcement agencies launched operation in the residential areas in Wagah after the attack and taken 20 suspects into custody.
"A joint investigation team of police, rangers and intelligence agencies have started its probe into the incident. The army and rangers along with police will provide security to Muharram processions in Lahore and they have been put on high alert in the wake of Sunday's attack," he said.
They also arrested a suspected suicide-bomber from Multan district, some 350 kilometres from Lahore. The Lahore police yesterday issued a sketch of 17-year-old Abdul Rehman who had gone missing from a seminary in old city of Lahore for a month.
"The police along with an intelligence agency have raided a house in Multan district and arrested Abdul Rehman," Naqvi said, adding Rehman has been shifted to unknown place for interrogation.
At least 61 people, including 10 women, eight children and three security personnel, have died in the attack that took place yesterday when a suicide attacker detonated a powerful bomb at Wagah.
Over 100 injured are being treated in different hospitals in Lahore. 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.
al-Qaeda affiliated militant group Jundullah (Soldiers of Allah), a splinter group of the Tehrik-i-Taliban Pakistan (TTP), was the first to claim the attack. Shortly afterwards Jamaat-ul-Ahrar said its bomber Hafiz Hanifullah carried out the attack.
Later, a lesser-known Mahar Mehsud group also claimed responsibility for the bombing. Hours after cancelling the beating retreat ceremony at Wagah following a deadly suicide attack, Pakistan today allowed general public to view the popular ceremony.