In a new expulsion campaign, Pakistan is forcing many Afghans out of the country

Afghan families ride on a truck heading to a border crossing in Torkham, Pakistan, Tuesday, before the expiration of a Pakistani deadline for those who are in the country illegally to leave or face deportation. Pakistan's crackdown has worried thousands of Afghans in the country awaiting relocation to the United States under a special refugee program since fleeing the Taliban takeover. (Muhammad Sajjad/AP)

PESHAWAR, Pakistan — Large numbers of Afghans crammed into trucks and buses in Pakistan on Tuesday, heading to the border to return home ahead of the expiration of a Pakistani government deadline for those who are in the country illegally to leave or face deportation.

The deadline is part of a new anti-migrant crackdown that targets all undocumented or unregistered foreigners, according to Islamabad. But it mostly affects Afghans, who make up the bulk of migrants in Pakistan.