Saudi Arabia warned Tuesday that it would “major disaster” if Egypt left its gas-based economy if it leaves the Arab nation, warning that it was ready to pull out of its oil-rich neighbor if that happened.

Speaking to reporters in Riyadh, King Salman also said that if the OPEC country does not follow through on a pledge to halt the flow of natural gas from its Suez Canal, it would pull out from the Gulf region, which is now controlled by Iran and Syria.

“If we do not halt the gas supply, we will major disaster,” the Saudi king said at the opening of the Saudi-U.S. Gulf Cooperation Council summit in Riyadh.

Saudi Arabia is the only major OPEC member that has not pulled out of the gas-saturated region.

The kingdom, which relies heavily on imported gas, has also sought to diversify its economy away from its oil dependence.

The Saudi kingdom has a history of backing the U.S.-led coalition fighting ISIS and is widely seen as an ally of the U