U.S. Secretary of State Marco Rubio left El Salvador on Tuesday with an agreement from that country's president to accept deportees from the U.S. of any nationality, including violent American criminals now imprisoned in the United States.

It is unclear whether the Trump administration plans to send incarcerated U.S. citizens to El Salvador. Secretary of State Marco Rubio said the United States is “grateful” for the offer.

U.S. Secretary of State Marco Rubio visited El Salvador and its president Nayib Bukele on Monday as part of a Central American tour. Rubio called the highly unorthodox and potentially illegal scheme an “act of extraordinary friendship to our country.