Gulf Arab monarchies sent thousands of heavily armed troops to reinforce loyalists in Yemen in the battle against Iran-backed rebels, media reported Monday.

The reinforcements come after a missile attack by the Shiite Huthi insurgents on Friday killed 60 Gulf soldiers — 45 Emiratis, 10 Saudis and five Bahrainis.

The Sunni-ruled Gulf states have remained tight-lipped about the new troops sent mainly by Qatar and Saudi Arabia to Marib province east of Yemen’s rebel-held capital Sanaa. […]