The American student released recently from North Korea has reportedly been in a coma for more than a year, according to his parents.

The parents of Otto Warmbier — who had been sentenced to 15 years in prison with hard labor — said in a statement Tuesday that their son has left North Korea.

"Otto has left North Korea. He is on Medivac flight on his way home. Sadly, he is in a coma and we have been told he has been in that condition since March of 2016. We learned of this only one week ago," Fred and Cindy Warmbier said in a statement, according to CNN.