MUMBAI, India — For the past decade, Mustafa Kamal Sheikh set up a makeshift stall opposite a police station in a working-class suburb of Mumbai. His speciality was jhalmuri , a fiery snack made of puffed rice and spices. The cops often came down for a bite and small talk.

One day in June, two officers came to his house and asked for his ID. He showed them four, including a card that identified him as a voter in Indian elections. Kamal says the constables accused him of forging them and detained him. He denies the accusation.

Kamal, 52, did not get a phone call or a lawyer. Over the next five days, he says the police and a team of India's Border Security Force flew him more than a thousand miles away, to the India-Bangladesh border.

One midnight, Kamal says, "The border guard gave us

See Full Page