YEREVAN, JUNE 20, ARMENPRESS. The US student held in captivity for more than 15 months in North Korea has died a week after returning home, BBC reports.

Otto Warmbier, 22, was serving 15 years hard labour, accused of attempting to steal a propaganda sign from a hotel.

He was returned to the US last Tuesday, with North Korea saying it was on humanitarian grounds.

North Korea said he had been in a coma for a year after contracting botulism but his family say he was subjected to "awful torturous mistreatment".

A team of US doctors have also disputed North Korea's version of events.

Mr Warmbier had suffered severe brain damage, and was medically evacuated from North Korea on 13 June to a hospital in his home city of Cincinnati, Ohio. It is unclear how he fell ill.

President Donald Trump said Mr Warmbier's death had deepened his administration's resolve "to prevent such tragedies from befalling innocent people at the hands of regimes that do not respect the rule of law or basic human decency".

"The United States once again condemns the brutality of the North Korean regime as we mourn its latest victim," the presidential statement added.