"I can tell you that today, at the University of Cincinnati Medical Center, Otto is in stable condition, but has suffered a severe neurological injury," Martin stated.
Martin also said Warmbier's doctors will release more detailed information about his condition later today.
In March 2016, Warmbier was sentenced to 15 years in prison for trying to steal a political banner, an action that was classified by Pyongyang as a "hostile" act against North Korea.
Fred Warmbier, Otto's father, blamed North Korea for his son going to the country in the first place saying, "The North Koreans lure Americans to travel to North Korea via tour groups that run out of China that advertise slick ads on the internet proclaiming no American ever gets detained off of our tours and this is a safe place to go."
While it is not illegal for Americans to travel to North Korea, the US State Department "strongly warns" citizens not to travel there due to a serious risk of arrest and long-term detention.
Fred Warmbier also noted he received a phone call from President Donald Trump on Wednesday night, and Trump told the family how hard Secretary of State Rex Tillerson had worked to bring their son home.