The Latest: South Korea president criticizes North on death

South Korean President Moon Jae-in says North Korea must bear "heavy responsibility" for the death of a 22-year-old U.S. college student it detained for nearly a year and a half.

U.S. Sen. John McCain says Americans who are "stupid" enough to still want to visit North Korea should be required to sign a waiver absolving the U.S. government of any blame if they're harmed while there.

The coroner's office in Cincinnati is investigating the death of an American college student who died less than a week after his return from North Korea, where he was detained for nearly a year and a half.

Doctors had described Warmbier's condition as a state of "unresponsive wakefulness" and said he suffered a "severe neurological injury" of unknown cause.

The China-based travel agency that organized a trip to North Korea for an American college student who died after being released in a coma from North Korean detention said it would no longer take U.S. citizens to the country.

Young Pioneer Tours said Tuesday on its Facebook page that the death of 22-year-old Otto Warmbier shows that the risk American tourists face in visiting North Korea "has become too high."

Doctors had described Warmbier's condition as a state of "unresponsive wakefulness" and said he suffered a "severe neurological injury" of unknown cause.