An American university student who came back to the United States this week after being held in North Korea for 17 months has a severe brain injury and is in a state of “unresponsive wakefulness,” said by doctors on Thursday.

Otto Warmbier, 22, who came in the United States on Tuesday, is stable but “shows no sign of understanding language, replying to spoken instructions or knowing his around,” said by Dr Daniel Kanter, healthcare home of the neuroscience intense care unit at the University of Cincinnati Medical Center.

Warmbier’s family discovered this week that the University of Virginia student from Wyoming, Ohio, has been in a coma since March 2016, and the University of Cincinnati Medical Center and on Thursday doctors said that he obviously experienced “respiratory problems,” and the Oxygen supply to the brain was cut off.

Doctors said this type of lack of is usually the result of the cardiopulmonary arrest, which is when the heart stops beating for a period of time and can’t deliver blood to the brain.

They included there was no proven information about how or when the arrest happened, though they believed that it happened within weeks of an Apr 2016 brain scan offered to them by the North Koreans.

Doctors said they were offered with few healthcare materials from the North Koreans regarding Warmbier’s treatment. They received another brain scan, on 2016 July, as well as numerical values of blood tests.

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Image: abc11.com

Doctors said they did not see any obvious signs of accidents, stressful damage to the brain or bone fractures. They included that there was no proof of botulism, as previously stated by the North Koreans.

Such detentions in the totalitarian country have included with stress between California and Pyongyang. The U.S. govt accuses North Korea of using such detainees as governmental pawns. North Korea accuses Washington and South Korea of delivering agents to overthrow its govt.