The expulsions mostly affect Afghans, who make up the majority of foreigners in Pakistan. It has drawn criticism from the Taliban-led government in Afghanistan as well as human rights organizations.
The number of border crossings used to deport thousands of Afghans rose to five after the new facilities were opened in southwestern Balochistan province, said Jan Achakzai, the caretaker provincial information minister.
Currently, about 15,000 Afghans have been crossing the border every day from Pakistan. Before the crackdown, around 300 people were crossing each day.
International aid agencies have documented chaotic and desperate scenes among Afghans who have returned from Pakistan.
Achakzai said police in Balochistan in recent days had arrested more than 1,500 Afghans who had no valid documents. A prominent Pakistani human rights lawyer, Moniza Kakar, said in the southern port city of Karachi that police had launched midnight raids on homes and detained Afghan families, including women and children. The head of the Human Rights Commission of Pakistan, Hina Jilani, said Pakistan lacks a comprehensive mechanism to handle refugees, asylum-seekers and migrants without papers, despite hosting Afghans for 40 years.
Violence against Pakistani security forces and civilians has surged since the Taliban takeover of Afghanistan two years ago. Most attacks have been claimed by the Pakistani Taliban, the Tehreek-e-Taliban Pakistan, or TTP, a separate militant group but a close ally of the Afghan Taliban.
Pakistan often accuse the Taliban of harboring militants from groups like the TTP – allegations the Taliban deny – and said Afghans without permanent legal status are responsible for some of the attacks.
Pakistan has long hosted millions of Afghans, most of whom fled during the 1979-1989 Soviet occupation. More than half a million fled Afghanistan after the Taliban takeover.