The State Department is preparing to raise its travel advisory worldwide to Level 4: Do Not Travel – the highest level — in the face of the coronavirus pandemic.

Four sources told CNN that Secretary of State Mike Pompeo had approved a Level 4 advisory.

Late last Wednesday, the advisory was raised globally to Level 3: Reconsider Travel “due to the global impact of COVID-19.”

Politico was the first to report the heightened advisory level. CNN has reached out to the State Department for comment.

Another source told CNN that the move would be aimed at curtailing Americans’ travel abroad and to get those who are traveling to come home.