The United States is launching an operation to evacuate Afghans who helped US troops during the war in Afghanistan and are facing threats to their lives from the Taliban, the Biden administration announced on Wednesday.

Flights out of Afghanistan for those who are already in the process of obtaining special immigrant visas (SIVs) will start in the last week of July, The Hill quoted a senior administration official in a statement. No further details on when the evacuations will start will be released, the statement said, citing “operational security.”