Saudi Arabia's King Salman, in a phone call on Sunday with President Donald Trump, agreed to support safe zones in Syria and Yemen, a White House statement said.
"The president requested and the King agreed to support safe zones in Syria and Yemen, as well as supporting other ideas to help the many refugees who are displaced by the ongoing conflicts," the statement said.
A senior Saudi source told Reuters the two leaders spoke for over an hour by telephone and agreed to step up counter-terrorism and military cooperation and enhance economic cooperation.
The White House statement said the two leaders also agreed on the need to address "Iran's destabilizing regional activities."
It is generally understood that "safe zones" will require military protection and that this could draw the United States further into military battle in the regions should the United States provide military personnel for such zones. It is generally belived that the US would supply personnel for any safe zones established in at least Syria.