Iraqis who say their lives are in danger because they worked with the U.S. government in Iraq fear that their chances of finding refuge in the United States may vanish under an order signed on Friday by President Donald Trump.

The order temporarily suspends the United States' main refugee program and halts visas being issued to citizens of several predominantly Muslim countries, including Iraq. It is expected to affect two programs that U.S. lawmakers created a few years after the 2003 invasion of Iraq to help the tens of thousands of Iraqis who risked their lives helping Americans.

Trump says the order is necessary to prevent Islamist militants from coming to the United States posing as refugees, but refugee advocacy groups say the lengthy screening of applicants by multiple U.S. agencies makes this fear unfounded.