Diplomats were working to ensure the release of seven-time WNBA All-Star player Brittney Griner after Russia said it had detained the player last month for possession of vape cartridges containing hash oil, US Secretary of State Antony Blinken said on Sunday.

The Russian Customs Service, without naming Griner, said on Saturday that it had detained an athlete in February after the player arrived at Moscow's Sheremetyevo airport on a flight from New York.

Russian news agency TASS identified the player as...