Yemen’s Iran-backed Houthi rebels have hijacked an Israeli-linked ship in a critical Red Sea shipping route, taking the 25-member crew hostage.

The Houthi rebels claim that they hijacked the ship Sunday over its connection to Israel.

The group is warning that it will continue to target ships in international waters that are linked to or owned by Israelis until the end of Israel’s campaign against Gaza’s Hamas rulers.

According to Israeli Prime Minister Benjamin Netanyahu’s office, the crew members came from a range of countries, but no Israelis were on board the Bahamas-flagged Galaxy Leader.

The Israeli military called the hijacking a “very grave incident of global consequence.”