Barbie and Peter Reynolds, who were arrested by the Taliban in February, were kept underground for six weeks without daylight, their son says

At one point in the five and a half months they have been imprisoned in Afghanistan, Barbie and Peter Reynolds were kept in underground cells, deprived of sunlight for six weeks.

Their health is deteriorating rapidly. Peter, 80, has been chained and shackled, and recently had convulsions on the floor, much to the alarm of Barbie, 75, who herself has suffered from malnourishment and reports her hands and feet have turned blue.

“There’s a chance they die in there, and it’s escalating pretty fast,” their youngest son, Jonathan, 45, said. “They need to get to the hospital immediately.”

Since the British couple’s arrest on 1 February, the Reynolds family have been thrown into a nightmare, watching from afar as their elderly parents have struggled in a brutal prison system where they are being been held without charge.