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Charlie Heaton, the actor who portrays Jonathan Byers on the hit Netflix show Stranger Things, was detained at LAX Saturday for alleged cocaine possession, PEOPLE confirms.

The 23-year-old British actor was denied entry into the United States and sent back to the United Kingdom the same day, a law enforcement official confirms to PEOPLE.

Authorities allegedly found cocaine on the actor as he arrived into the country. Heaton was detained but not arrested.

A representative for Heaton did not respond to PEOPLE’s request for comment.

The actor was flying into the U.S. ahead of Netflix’s A-list premiere party for his show’s second season.

Heaton was noticeably absent on Thursday night as his costars Millie Bobby Brown, Winona Ryder, Gaten Matarazzo, Noah Schnapp, Finn Wolfhard, Natalia Dyer, Caleb McLaughlin, and Dacre Montgomery posed for pictures and celebrated the Netflix release.

A statement obtained by PEOPLE from the U.S. Customs and Border Protection says any “foreign national may be inadmissible due to the commission of a crime involving drug possession.”

“A violation, conspiracy to violate or simply an attempt to violate any U.S. State, federal or any foreign government controlled substance violation renders a foreign national inadmissible to the United States,” it reads.

It was not clear how much time Heaton would be denied entry into the U.S.

The Sun was first to report the incident.

This story originally appeared on PEOPLE.

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