Pres­i­dent Don­ald Trump told Gulf lead­ers on Wednes­day he ur­gent­ly wants “to make a deal” with Iran to wind down its nu­clear pro­gram but Tehran must end its sup­port of proxy groups through­out the re­gion as part of any po­ten­tial agree­ment.

Iran “must stop spon­sor­ing ter­ror, halt its bloody proxy wars and per­ma­nent­ly and ver­i­fi­ably cease pur­suit of nu­clear weapons,” Trump said in re­marks at a meet­ing of lead­ers from the Gulf Co­op­er­a­tion Coun­cil host­ed by Crown Prince Mo­hammed bin Salman in the Sau­di cap­i­tal. “They can­not have a nu­clear weapon.”

The U.S. and Iran have en­gaged in four rounds of talks since ear­ly last month fo­cused on Iran’s nu­clear pro­gram. Trump has re­peat­ed­ly said that he be­lieves bro­ker­ing a deal is pos­si­ble but that the win­dow is clos­ing.