Attaullah Khogyani, spokesperson for the governor of Nangarhar,
the main stronghold of Islamic State in Afghanistan, said the brothers were killed in Chaparhar district on Saturday night.
The eldest brother Nisar Tareliwal, 27, was a doctor at a private clinic, the middle brother Nayeem, 24, was working as a vaccine campaigner and the youngest Abdul Wahab, 19, was a medical student.
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Khogyani said the father of the victims, a doctor was beheaded last year by the Islamic State, which has acquired a reputation for brutality in the province, beheading prisoners on a number of occasions.
In a separate incident the Islamic State kidnapped 11 farmers in Rodat district of Nangarhar province, although they later released two of them. There was no claim by Islamic State about the two incidents.
Nangarhar, on the porous border with Pakistan, has become a
stronghold for Islamic State, generally known as Daesh in Afghanistan, which has grown to become one of the country's most
dangerous militant groups since it appeared around the start of
2015.
Afghanistan returns captured Pakistani soldier, five bodies
Lal Mohammed Durrani, deputy chairperson of the provincial
council in Nangarhar, said the abduction took place when the
farmers were working in poppy fields.
The process to harvest poppy crop has kicked off in
provinces across Afghanistan, the world's top opium producer.
Last year the UN Office on Drugs and Crime (UNODC) said
output of opium made from poppy seeds in Afghanistan, the
world's main source of heroin, stood at around 9,000 metric
tons.
The illicit drug has fuelled insecurity, violence and
insurgency in Afghanistan for several decades.
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