President Trump’s envoy for special missions, Richard Grenell, is delivering an in-person message to Venezuelan leader Nicolás Maduro that there will be consequences if detained Americans are not released and Venezuelan “criminals and gang members” deported from the U.

Richard Grenell, the envoy for special missions, said he was flying home with the detainees after he met with President Nicolás Maduro.

Six Americans who had been detained in Venezuela in recent months were freed by the government of President Nicolás Maduro after he met Friday with a Trump administration official.