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.

Houthi rebels in Yemen said Israeli airstrikes on Thursday targeted the rebel-held capital of Sanaa and the port city of Hodeida, following several days of Houthi launches setting off sirens in Israel.

Multiple air raids have hit several targets in rebel-held areas of Yemen, witnesses and the Iran-backed Houthi rebels said, with their media saying Israel launched the strikes.