Miller Gardner -- the 14-year-old son of former New York Yankees outfielder Brett Gardner -- died from carbon monoxide poisoning, Costa Rican authorities have said.

Costa Rica authorities confirmed that carbon monoxide poisoning was the cause of death of Miller Gardner, the 14-year-old son of former New York Yankees outfielder Brett Gardner.

A blood test for carbon monoxide showed a saturation level of 64% in Gardner’s body, Costa Rican officials said. Concentrations above 50% are considered lethal.

Arias, 84, told the AP on Wednesday that he received an email from the U.S. State Department on Tuesday, notifying him of the decision.

Former Costa Rican President and Nobel Prize winner Oscar Arias said the U.S. revoked his visa, weeks after he criticized President Donald Trump on social media.

Oscar Arias, the former President of Costa Rica and a Nobel Peace Prize winner, had his U.S. visa revoked unexpectedly. Arias, who is 84 years old, said he received an email from the U.S. State Department informing him of the cancellation.