Returning Afghans have nowhere to go and the agencies said they fear for people's survival and reintegration in a country overwhelmed by natural disasters, decades of war, a struggling economy, millions of internally displaced people and a humanitarian crisis.
Pakistan has hosted millions of Afghans over the decades, including those who fled their country during the 1979-1989 Soviet occupation.
At least 600,000 undocumented Afghans fled into Pakistan after the Taliban takeover in 2021.