The Yemen-based Houthi rebels launched their first attack on a commercial shipping vessel transiting the Red Sea in several months over the weekend, raising concerns that it could be the first in a new wave of such attacks.

The Magic Seas shipping vessel was about 50 nautical miles southwest of Al Hudaydah, Yemen, when several small vessels opened fire with small arms and self-propelled grenades, according to the United Kingdom Maritime Trade Organization. The crew had to be evacuated from the ship as it took on water due to the damage it sustained in the attack.