The attacks threaten trade routes and could escalate tensions involving U.S. and Western forces in the region.

The Houthis released dramatic footage of the sinking of the Liberian-flagged, Greek-owned Eternity C, which the rebels targeted with gunfire and explosive drones for hours, killing at least three crew members.

Germany has summoned the Chinese ambassador after a Chinese warship targeted a German aircraft with a laser in the Red Sea.

A ship came under attack Sunday in the Red Sea off the coast of Yemen by armed men firing guns and launching rocket-propelled grenades, a group overseen by the British military said.

The 19-member crew of a Greek bulk carrier severely damaged in the Red Sea by repeated attacks, most likely by Houthi militants, are safe and will arrive in Djibouti later on Monday, the ship's operator said.

Israel said early Monday that it carried out a wave of strikes on the Yemeni port city of Hodeida and other areas held by the Huthi rebels.