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Watch: Bulldozers tear down Afghan houses in Islamabad

By Caroline Davies

Pakistan correspondent

Pakistan has started to arrest Afghans as the country begins a nationwide crackdown on foreign nationals it says are in the country illegally.

Thousands of Afghans in Pakistan have made their way back to Afghanistan in the last two months. But many of them, who have called Pakistan home for decades, say they have nothing to go back to, while others say they are terrified to be heading back to the Taliban government.

You know you are getting closer to the border when the stream of trucks thickens. Faces old and young watch the road, sitting atop piles of furniture, firewood, cookers and air conditioning units that judder precariously as the vehicles weave through traffic on their way to Afghanistan.

We meet Abdullah at a petrol station in Punjab province. He has hired a truck to bring all 22 of his family members out of the country - 20 of them were born in Pakistan, he says.

"I initially came here when the Russian war started, I used to work in a brick kiln as a labourer. There are fewer job opportunities in Afghanistan," he tells the BBC.