UPDATE 10-Americans freed by Venezuela in US prisoner swap land at Texas base

(Adds witness details in paragraph 4, detainee comment in paragraphs 5-6)

By Marianna Parraga, Mayela Armas and Trevor Hunnicutt

CARACAS/WASHINGTON, Dec 20 (Reuters) - Some of the Americans who were freed by Venezuelan President Nicolas Maduro's government in a U.S. prisoner swap have landed at a U.S. military base in San Antonio, Texas, a Reuters witness said.

The individuals were freed on Wednesday in exchange for the U.S. release of an ally of Maduro, Colombian businessman Alex Saab, who was granted clemency by U.S. President Joe Biden and returned to Venezuela on Wednesday. Maduro also agreed to release at least 20 opposition-linked prisoners from prison.

U.S. prosecutors had accused Saab of siphoning off some $350 million from Venezuela via the United States in a scheme that involved bribing Venezuelan government officials. He denies the charge.

As part of the deal, all six Americans classified by the U.S. as wrongfully detained in Venezuela were released, along with four other Americans. The Reuters witness saw six detainees, including one on a stretcher, get off a plane at Joint Base San Antonio.

Savoi Wright, who was reportedly arrested and detained in October, told a journalist when he landed that he feared for his life at times, while other times he received good care.

"I didn't know if I would ever make it out," he said.

Venezuela also separately returned to the United States the fugitive Malaysian businessman Leonard Glenn Francis, known as "Fat Leonard," who is implicated in a U.S. Navy bribery case, the officials said.

The deal, the result of months of negotiations mediated by Qatar between OPEC member Venezuela and the United States, came after the White House said it would need to see progress on prisoner releases in order to continue with energy sanctions relief for Caracas.

Sanctions relief was unveiled in October in response to an agreement by the Venezuelan government to hold fair elections in 2024.

Although the releases could be seen as a step by Maduro to comply with U.S. demands, the return of Saab marks a victory for Maduro. Saab had not yet been convicted and his return to Venezuela was previously seen as unlikely.

Washington had given the Venezuelan government until Nov. 30 to make progress on removing public office bans on opposition candidates and start releasing political prisoners and "wrongfully detained" Americans in order to avoid a reinstatement of sanctions.

Venezuela is allowing opposition candidates to appeal their bans, but it had not made much progress on prisoner releases before this week.