The legal basis for the challenge by the Trump administration to US District Court Judge Geoffrey Crawford’s decision was not immediately available Thursday morning.

Mohsen Mahdawi, a 34-year-old U.S. permanent resident who was raised in a refugee camp in the West Bank, was detained during his April 14 naturalization interview in Vermont.

Columbia University student Mohsen Mahdawi — detained by authorities at his naturalization interview — is free for now. He had been in prison for two weeks after his arrest earlier in April.