Yemen’s foreign minister appealed Monday for Gulf Arab neighbors to launch military strikes against Shiite rebels threatening to overrun the last stronghold of the Western-allied government as the country sinks further toward full civil war.

Although Saudi Arabia and its Persian Gulf partners are fearful of spillover from Yemen’s collapse, they have given no indication of consensus on possible intervention and appear unlikely to quickly mobilize their joint military command.

The call for help reflects the increasing desperation of forces loyal to President Abed Rabbo Mansour Hadi as they try to hold off advances on Yemen’s second-largest city, Aden, by powerful insurgents known as Houthis and believed backed by Shiite power Iran. […]