Thirteen people were killed and over 70 others injured in the suicide blast which had targeted police officials.
Lahore Police on Friday finally registered a murder case against Pakistan Prime Minister Nawaz Sharif, his brother Shahbaz, key cabinet members and senior officials for their role in the killing of 14 supporters of Tahir-ul Qadri in the city, meeting a major demand of the fiery cleric.
At least 54 people, including 11 women and security personnel, were killed and about 200 others injured in a powerful suicide blast in Pakistan at Wagah on Sunday, minutes after the popular flag-lowering ceremony at the Indo-Pak border.
Pakistan's Punjab province Home Minister Shuja Khanzada was on Sunday assassinated along with eight others when a suicide bomber blew himself up at his house in Shadi Khal village in Attock district.
Senior police officers were among 13 people killed on Monday when a Taliban suicide bomber blew himself up targeting them during a protest rally outside Pakistan's Punjab assembly in Lahore that also wounded 60 others.
Posters, stickers and wall-chalking supporting Islamic State terror group have appeared some 15 kilometres from Pakistan Prime Minister Nawaz Sharif's Lahore farmhouse, prompting authorities to launch a probe into the possible presence of the dreaded militant outfit in the city.
A total of 45 suspects have been taken into custody by Pakistan police in connection with the deadly suicide blast at Wagah border which killed 63 people.
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.