U.S. basketball player Brittney Griner, who was detained at Moscow's Sheremetyevo airport and later charged with illegal possession of cannabis, looks on, on the day of a court hearing in Khimki outside Moscow, Russia, July, 15, 2022.
U.S. basketball player Brittney Griner, who was detained at Moscow's Sheremetyevo airport and later charged with illegal possession of cannabis, looks on, on the day of a court hearing in Khimki outside Moscow, Russia, July, 15, 2022. Reuters / EVGENIA NOVOZHENINA

President Joe Biden signed an executive order on Tuesday aimed at deterring and punishing wrongful detention of U.S. citizens abroad by authorizing government agencies to impose sanctions and other measures.

Biden has faced growing pressure from families of hostages and detainees, most recently on the case of WNBA star Brittney Griner, who has been held in Russia since February and is on trial on drug charges.

Deteriorating ties between the United States and Russia over Moscow's invasion of Ukraine spotlighted her detention and the wider issue.

The United States does not provide an official figure for how many U.S. citizens are detained abroad, but the James W. Foley Legacy Foundation, named after an American journalist abducted and killed in Syria, says that more than 60 U.S. citizens are wrongfully detained in about 18 countries.

Some are held by top U.S. adversaries such as Iran, Russia, Venezuela and China.

Biden was "committed to getting all these cases resolved and ... at the same time, start to bring up a deterrence strategy that can raise the cost of hostage-taking and wrongful detention," a senior administration official said in a call with reporters on Monday.

The executive order authorizes agencies to impose unspecified costs and consequences, including financial sanctions, on those involved in hostage-taking.

"The sanctions authority included in this E.O. enables the United States to impose financial and travel sanctions on those who are responsible for unjustly holding U.S. nationals, whether their captor is a terrorist network or a state actor," U.S. Secretary of State Antony Blinken said in a statement.

The order directs government agencies to work more closely with detainees' families and share information and possibly intelligence, U.S. officials say.

As part of the new steps, State Department travel advisories will add warnings when there is elevated risk of wrongful detention in a foreign country. On Tuesday, six countries -- Myanmar, China, Iran, North Korea, Russia and Venezuela -- will receive the warning.

The administration held a video call on Monday with family members of detainees to preview the executive order, according to several participants. Several were disappointed, saying they were not allowed to speak on the call and were skeptical the order would be effective.

The order "appears to concern deterring future cases more than solving the current ones," one participant said.

The Foley foundation says countries wrongfully holding Americans include Belarus, Burkina Faso, Cambodia, China, Cuba, Egypt, Iran, Mali, Myanmar, Nicaragua, Russia, Saudi Arabia, Syria, Turkey, Uganda, the United Arab Emirates, Venezuela and Yemen.

Russia's release in April of former U.S. Marine Trevor Reed intensified calls by relatives of others held overseas for Biden to act.

Reed was freed after three years of detention as part of a prisoner swap with Russia. Biden commuted the U.S. prison sentence of Russian pilot Konstantin Yaroshenko.

Several weeks before Reed's release, his parents met with Biden after demonstrating outside the White House. Family members say they believe the path to securing release begins with meeting face-to-face with Biden, a view the administration has sought to discourage.