People rallied in Skardou town of Gilgit Baltistan province where funeral prayers for 18 slain Shia Muslims were offered on Wednesdays under tight security.
Meanwhile, hundreds also staged a massive rally in Shikarpur city of southern Sindh province.
Chanting anti government slogans, the protestors demanded President Asif Ali Zaradri and the premier Yousaf Reza Gilani’s resignation over their government’s failure to protect Shia people from militants.
The Shia Muslims were killed on Tuesday when a bus, carrying passengers from Rawalpindi to the northern town of Gilgit, came under attack in the mountainous region of Kohistan. Several others were injured during the attack.
The bus was carrying 39 people, mostly Shia pilgrims, returning to their hometowns after visiting holy shrines in different Iranian cities.
In a statement released on Tuesday, UN Secretary General Ban Ki-moon condemned the attack, extending his condolences to families of the victims of the “abhorrent attack” as well as the government in Pakistan.
Jundallah terrorist group has claimed responsibility for the attack.
MSH/MB