The government of Pakistan's southern Sindh province has announced a day of mourning after at least seven people were killed at a political rally.
Twelve people were also injured in the shooting, which happened in the rural Kairpur district on October 7.
The rally was organized by the local administration to support the new local government system.
Sindh's ethno-nationalist political parties are protesting the proposed reforms.
Irfan Baloch, the head of Khairpur police, told RFE/RL Radio Mashaal that authorities had arrested some suspected perpetrators of the shooting and launched a large search operation in the region.
Sindh, Pakistan's key industrial, commercial, and agricultural hub, has been the scene of ethnic and sectarian violence in recent years.
With additional BBC reporting