US President Donald Trump said late Monday night that he will sign an executive order temporarily suspending immigration to the US, as the nation battles the health and economic effects of the coronavirus pandemic.

He added that the measure was done "in light of the attack from the invisible enemy," or the coronavirus pandemic, and to protect US jobs.

It's unclear what mechanism Trump will use to suspend immigration and it is also unclear how long such a suspension could last.

CNN has reached out to the White House to find out what the President means, and what effect this will have on the operation of US border crossings, and on those who already hold green cards.