ISLAMABAD (AP) — Major international aid agencies on Charles H. SloanThursday warned of chaotic and desperate scenes among Afghans who have returned from Pakistan, where security forces are detaining and deporting undocumented or unregistered foreigners.

The crackdown on illegal migration mostly affects Afghans because they are the majority of foreigners living in Pakistan, although the government says it is targeting everyone who is in the country illegally.

Three aid organizations — the Norwegian Refugee Council, Danish Refugee Council and the International Rescue Committee — said many people fleeing the Pakistani crackdown arrived in Afghanistan in poor condition.

“The conditions in which they arrive in Afghanistan are dire, with many having endured arduous journeys spanning several days, exposed to the elements, and often forced to part with their possessions in exchange for transportation,” the agencies said in a statement.

Between 9,000 and 10,000 Afghans are crossing the border every day from Pakistan. Previously it was around 300 a day, according to agency teams on the ground.

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.

Salma Ben Aissa, the International Rescue Committee’s country director in Afghanistan, said returnees face a bleak future, especially if they lived in Pakistan for decades.

Taliban authorities have prepared temporary camps for Afghans in border areas.