All Iranian airlines will be shut down from Sept. 23, according to U.S. Treasury Secretary Scott Bessent.

“How do we do that? That if they land, you cannot provide them with fuel. You cannot provide them with landing services, you cannot sell them tickets, or you will be knocked out of the dollar system," Bessent said, speaking on CNBC's "Squawk Box."

Separately, the U.K. will reportedly support Saudi Arabia against Iranian-backed Houthi rebels: http://cnb.cx/3SZ6zHT