The American strikes come amid an intensifying, parallel drive by U.S. ally Israel, which has launched its own series of airstrikes on Houthi targets in response to recent missile and drone attacks on Israel that, while mostly intercepted, have struck some civilian sites and have sent millions seeking regular refuge in bomb shelters.

A missile fired by Yemen’s Houthi rebels targeted central Israel early Tuesday, causing sirens to blare and people to flee into bomb shelters. Several Israeli strikes also hit the Gaza Strip overnight and early on Tuesday,