Two Liberian-flagged ship attacks and a round of Israeli airstrikes early Monday targeting Houthi rebels raised fears of a renewed Houthi campaign against shipping.

The Houthis attacked the Liberian-flagged, Greek-owned bulk carrier Magic Seas with drones, missiles, rocket-propelled grenades and small arms fire on Sunday, forcing its crew of 22 to abandon the vessel.

The attack on the Magic Seas, a dry bulk carrier owned by Greece’s Stem Shipping, was the first on a commercial vessel since December by the group, which is backed by Iran. It was followed almost immediately by Israeli strikes on a number of Houthi-held ports in Yemen.