A new attempt has begun to try to salvage an oil tanker burning in the Red Sea after attacks by Yemen’s Houthi rebels, a European Union naval mission said Saturday.

The EU’s Operation Aspides published images dated Saturday of its vessels escorting three ships heading to the Greek-flagged oil tanker Sounion.

The mission has “been actively involved in this complex endeavor, by creating a secure environment, which is necessary for the tugboats to conduct the towing operation,” the EU said.

A phone number for the mission rang unanswered Saturday. However, satellite images taken Saturday morning by Planet Labs PBC and later analyzed by The Associated Press showed what appeared to be the three salvage vessels close to the Sounion. A warship could be seen nearby.