WNBA star Brittney Griner released from Russian detention in prisoner swap for convicted arms dealer

(CNN) -- WNBA star Brittney Griner has been released from Russian detention, President Joe Biden said Thursday.

A source familiar with the matter tells CNN that the swap involves convicted Russian arms dealer Viktor Bout. The swap did not include another American that the State Department has declared wrongfully detained, Paul Whelan.

"She's safe, she's on a plane, she's on her way home," Biden said at the White House Thursday morning alongside Griner's wife, Cherelle. "After months of being unjustly detained in Russia, held under intolerable circumstances, Brittney will soon be back in the arms of her loved ones, and she should have been there all along."

Biden acknowledged that Griner's release was occurring while Whelan remained imprisoned, saying that Whelan's family "have to have such mixed emotions today."

"This was not a choice of which American to bring home," Biden said. "Sadly, for totally illegitimate reasons, Russia is treating Paul's case differently than Brittney's. And while we have not yet succeeded in securing Paul's release, we are not giving up. We will never give up."

Biden said efforts to bring Griner home took "painstaking and intense negotiations" as he thanked members of his administration who were involved.

"This is a day we've worked toward for a long time. We never stopped pushing for her release," he said.

'The only deal we could make right now'

Biden gave final approval for the prisoner swap freeing Griner over the past week, an official familiar with the matter said, adding that Biden was updated on the swap as it was taking place this morning.

He was briefed throughout the morning as he awaited confirmation that Griner was back in US hands, a US official says. Once that happened, Biden spoke with Griner from the Oval Office, with Cherelle Griner, Vice President Kamala Harris and Secretary of State Antony Blinken was also on the call, a second official said.

Biden was "personally involved and in constant touch" with his team as this deal came together in the final days and after he gave his personal green light to execute the trade. The briefings -- and questions Biden asked his team -- were constant, a senior administration official says.

The official added that this was the right deal to make, but notably said this was "the only deal we could make right now."

The Russians signaled recently that they were only willing to negotiate for Griner and not Whelan, a US official said. That is because Russia has been handling their cases differently based on what each has been accused of.

The Biden administration repeatedly made offers to get Whelan released as part of this deal, even after Russia made clear only Griner was acceptable.

In the end, when it was clear Russia was going to refuse on Whelan, the US had to accept it.

"It was a choice to get Brittney or nothing," the US official said.

The official says that was a "difficult decision" for Biden but again, one he felt he had to make.

'Merchant of Death' included in swap

Russia said on Thursday that Bout has returned home to Russia, the Russian foreign ministry said. The prisoner exchange with Griner was "completed successfully at Abu Dhabi Airport" on Thursday, state media added.

Bout, nicknamed the "Merchant of Death," is a former Soviet military officer serving a 25-year prison sentence in the United States on charges of conspiring to kill Americans, acquire and export anti-aircraft missiles, and provide material support to a terrorist organization. Moscow had slammed his sentencing in 2012 as "baseless and biased" and Bout has maintained he is innocent.

Griner -- who, for years, had played in the off-season for a Russian women's basketball team -- had been detained since February, when she was arrested on drug smuggling charges at an airport in the Moscow region. Despite her testimony that she had inadvertently packed the cannabis oil that was found in her luggage, she was sentenced to nine years in prison in early August and was moved to a penal colony in the Mordovia republic in mid-November after losing her appeal.

Whelan, a US, Irish, British and Canadian citizen, was detained at a Moscow hotel in December 2018 by Russian authorities who alleged he was involved in an intelligence operation. He was sentenced to 16 years in prison on espionage charges he has vehemently denied. Whelan had been carrying out his sentence at a different labor camp in Mordovia, an eight-hour drive from Moscow, where he told CNN in June 2021 he spent his days working in a clothing factory that he called a "sweatshop."