Homeland Security Secretary Kristi Noem said Wednesday that the Trump administration has revoked a decision that would have protected roughly 600,000 people from Venezuela from deportation, putting some of them at risk of being removed from the country in about two months.

This decision will have a horrific impact on more than 505,400 Venezuelans who currently hold protected status,” the legislators wrote.

The announcement came a day after the U.S. secured the release of six hostages from the South American country.