Yemen is an Arab country on the southern end of the Arabian Peninsula bordering both the Red Sea and Gulf of Aden. Due to this, it holds a vital strategic location on the eastern side of the Bab al-Mandab Strait at the entrance to the Red Sea.
The country has been embroiled in a civil war for several years, with the internationally-recognized government fighting against the Houthi movement in the South.
"Due to the terrorist Houthi regime's use of seaports for its terrorist activities, we urge all those present at these ports to evacuate," said IDF Arabic spokesman Avichay Adraee.
The last sirens that were sounded in the Israeli capital occurred 13 hours prior, also due to a missile launch from Yemen, and the third missile that fired towards Israel in two days.
Following the sirens, the IDF announced that the missile had been intercepted.
Operation Rough Rider, which began on March 15, during which the US military said it struck over 1,000 targets, cost $1 billion in its first month.
IDF's Arabic spokesperson, Col. Avichay Adraee, warned locals should evacuate until further notice for their own safety.
Sources said there are growing differences between Netanyahu and Trump on Iran, the Houthis, and the IDF's expanding ops. in Gaza.
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Rather than an airstrike, an explosion at the port occurred after a tanker carrying fuel exploded.
Yemen's Houthis fired a missile at Israel Friday afternoon, which was intercepted by the Israeli military.