A United Nations human rights expert has called on the Pakistani authorities to make it a top priority to locate and protect four disappeared human rights and social media campaigners, saying no government should tolerate attacks on its citizens.

David Kaye, the UN Special Rapporteur on the right to freedom of expression said, by making the investigation of these disappearances an urgent priority, the Pakistani authorities can send a strong signal that they take seriously the responsibility for the life and security of all of its citizens, particularly in cases involving freedom of expression.

Kaye said, free expression campaigners and experts have long called for the abolition of criminal blasphemy provisions in Pakistan, which may carry the death penalty.