U.S. Citizenship and Immigration Services (USCIS) Director Joseph B. Edlow announced Thursday at the direction of President Donald Trump, he directed a “full scale, rigorous reexamination” of every green card issued to immigrants from “every country of concern.”

“The protection of this country and of the American people remains paramount, and the American people will not bear the cost of the prior administration’s reckless resettlement policies,” Edlow wrote in a statement on X. “American safety is non negotiable.”

The specific list of “countr[ies] of concern” has not yet been released.

Hours after the attack Wednesday, USCIS announced processing of all immigration requests relating to Afghan nationals was stopped indefinitely pending further review of security and vetting protocols.