A provincial health official says an airstrike by the Saudi-led coalition has struck a market in northern Yemen, killing 11 people, including an 11-year-old boy.
The coalition destroyed a boat carrying explosives as it headed toward the tanker on Saturday, coalition spokesman Colonel Turki al-Maliki said. "It has been intercepted and destroyed over the skies of Najran and there was no loss of life", he said.
Al-Maliki continued to say the Houthis are using the port of Hudaydah as a means for "smuggling advanced weaponry, but also as a launch pad for attacks on global ships".
On Wednesday, Houthi rebels threatened to cut off the Red Sea shipping line if the Saudi-led coalition forces keep advancing toward the Yemeni port city of Hodeidah, according to Houthi-controlled Saba agency.
Yemen, one of the Arab world's poorest countries, is embroiled in a proxy war between the Houthi armed movement, allied with Iran, and a US -backed military coalition headed by Saudi Arabia.
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Brigadier-General Tareq Mohammed Saleh - who led a brigade of an elite Yemeni army unit before his uncle was forced to step down in 2012 - had been expected to help lead Saleh's supporters in a fresh fight against the Iran-aligned Houthis, who control most of northern Yemen, including the capital Sanaa.
The war has killed more than 10,000 Yemenis, mostly civilians, and pushed the country to the brink of mass starvation.
Yemen has been dogged by violence since 2014, when the Houthis - backed at the time by forces loyal to Saleh's GPC - overran much of the country, including Sanaa.
In November, the coalition tightened the blockade after the Huthis fired a missile into Saudi Arabia that was intercepted near Riyadh's worldwide airport.