He stated that the American side considers the detention of the basketball player "illegal", and also demands her immediate release.
He stressed that the United States urges Russia to "constructively" interact on the issue of prisoner exchange.
According to him, the American side will do "everything possible" to return US citizens Paul Whelan and Brittney Griner, convicted in Russia.
Earlier, the official representative of the Russian Foreign Ministry, Maria Zakharova, announced that Moscow was ready to take action on the exchange of prisoners with the participation of Brittney Greiner.