A U.S. citizen arrested by Russian customs officers for alleged drug smuggling has been released and is set to return home soon, his mother said Sunday.

Kalob Byers, 28, was detained on Feb. 7 at Moscow’s Vnukovo Airport after arriving from Istanbul with cannabis-infused marmalade. Byers claimed the sweets were prescribed by a doctor in the United States to treat his seizures.

His mother, Tony Shuler, said he was held without medication for eight days, during which he suffered a “massive seizure.” On Sunday, she announced that Russian authorities had released him.

“He is now in American custody and at the U.S. Embassy waiting for his flight home,” Shuler wrote on Facebook.

Later on Monday, the Kremlin confirmed Byers’ release, which it said was connected to an upcoming meeting between top Russian and U.S. officials in Saudi Arabia where they are expected to discuss restoring bilateral relations.

There was no immediate response from U.S. officials.

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According to Shuler, Byers had gone to Russia to complete the necessary documents for his marriage to Naida Mambetova, a Russian fiancee he had met while she was studying abroad in the United States. She did not say if Mambetova was also being held.

Shuler wrote last week, “Neither he nor his fiancée deserve what they are being charged with.” Penalties for drug smuggling in Russia range from five to ten years in prison.

Former U.S. Marine Robert Gilman, retired English teacher Stephen Hubbard, and dual national Ksenia Karelina are among the American citizens currently detained by Russia.

In the past, Moscow has been accused by Washington of holding Americans on politically motivated charges in order to gain leverage in prisoner swaps.

In the first prisoner swap between the two nations since August, Russia traded convicted cryptocurrency scammer Alexander Vinnik for U.S. educator Marc Fogel last week.