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.
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.