Pakistan currently hosts an estimated 3.5 million Afghans, of which around 1.7 million are undocumented, according to government figures.
Pakistani authorities have said that Islamabad wants all Afghan nationals to leave except for those who have valid visas.
The UNHCR also voiced alarm at the scale and speed of returns. Babar Baloch, spokesperson for the agency, said more than 50,000 Afghans crossed back from...
Migrants are being pulled off the streets without notice, loaded onto buses, and abandoned at the Afghan border, Khalilzad said.