Amnesty International is urging the Pakistani government to take urgent steps to end killings and abductions in the southwestern province of Baluchistan.
The rights group on Friday condemned the killing of Saba Dashtiyari, a professor who was shot and killed by gunmen on June 1 in the provincial capital, Quetta.
While no one has claimed responsibility for Dashtiyari's death, Amnesty says groups in Baluchistan have accused Pakistani security forces of carrying out his killing.
Amnesty is calling for an independent, impartial and transparent probe into the incident.
The group says more than 150 political activists, journalists, lawyers and student have been killed in the past year.