In Yemen

High Representative of the European Union for Foreign Policy and Security Policy and Vice-President of the European Commission, Josep Borrell, emphasized the effectiveness of the European Union as a maritime security force during his visit to the headquarters of Operation Shields in Larissa.

An aerial drone launched by Yemen's Houthi rebels struck and damaged a Liberian-flagged, Greek-owned bulk carrier in the Red Sea on Sunday, officials said, the latest attack by the group targeting shipping in the vital maritime corridor.

Greece sent its frigate "Psara" to the Red Sea this week to join Operation Aspides, the EU's mission in the Red Sea to protect merchant ships from Houthi attacks. The Psara is replacing the Hydra, which completed a three month deployment in the Red Sea, at a time when the Houthis are escalating their campaign.

The US Naval Forces Central Command announced Sunday the rescue of the crew, with one mariner still missing, from the Greek-owned M/V Tutor, a Liberian-flagged vessel, by sailors of the Dwight D. Eisenhower Carrier Strike Group following a Houthi attack in the Red Sea.

The bulk carrier suffered severe flooding from an unmanned surface vessel strike on Wednesday.

The crew of a Greek-owned vessel Tutor that was damaged in an attack by Yemeni Houthi militants in the Red Sea should be rescued within the day although one sailor is still missing, officials in the Philippines had said.

A seafarer on the Greek-owned bulk carrier Tutor was killed in Wednesday's Houthi attack against the ship, it was reported on Thursday. 

The carrier is owned by Evalend Shipping, which, according to reports, has already notified the Greek authorities of the seafarer's death.

It is not yet clear if the seafarer died when the shell hit the ship or when the engine room flooded. 

Yemen's Iran-backed Houthi rebels have detained more than a dozen aid workers, including United Nations staff, in an apparently coordinated sweep, a diplomatic source and a Yemeni NGO said on June 7.

At least 18 aid workers were kidnapped in four rebel-held parts of the war-torn country, the Yemeni Mayyun Organization for Human Rights said, listing 10 workers from U.N. agencies.

Closer international cooperation between naval missions in the Red Sea has reduced the number of attacks by Yemen's Houthis over the past week, Greek Shipping Minister Christos Stylianides told Reuters in an interview on Tuesday.

Greece is the home of the headquarters of the European Union's naval operation in the Red Sea, which is dubbed "Aspides" and in Greek means "Shields".

Yemen's Iran-backed Houthis on Friday threatened to escalate attacks on Red Sea shipping after overnight strikes by the United States and Britain killed 16 people, according to rebel media.

Greek-owned bulk carrier "Yannis" came under missile attack by Yemen's Houthis while crossing the Red Sea on Thursday, AFP reports.

Reportedly, the attack took place 68 miles off the Yemeni port of Hudayda and caused no damage to the ship.