Immigration and Customs Enforcement has removed the last 18 detainees from Guantanamo Bay, Cuba, emptying the detention site of all illegal immigrants.

The 18 men who were awaiting deportation were transferred on a charter flight to the United States on Wednesday, the New York Times reported. It remains unclear to where they were flown, but this has been a common practice for the Department of Homeland Security, wishing to consolidate mass deportation flights amid the Trump administration’s crackdown on illegal immigration.