The Israeli strikes on Thursday landed as the head of the UN's World Health Organization said he and his team were preparing to fly out from Yemen's Houthi rebel-held capital

Yemen-based Houthis — the last of Iran-backed groups still fully present in the regional war that began 14 months ago — are slowly escalating attacks on Israel with an eye to avoid full-out retaliation.

As officials caution that ballistic missile and drone attacks from Yemen are likely to persist, Jerusalem is indicating that Thursday’s strikes are