In this file photograph dated March 12, 2018, Saudi soldiers stand guard before aid supplies are unloaded from a Saudi air force cargo plane at an airfield in Yemen's central province of Marib. (ABDULLAH AL-QADRY / AFP)

CAIRO - Houthi rebels attacked a military training camp in the Yemeni city of Marib on Saturday, killing 60 military personnel and wounding dozens others, Saudi state television said on Saturday evening. 
Two medical sources told Reuters the attack killed 73 people and left dozens wounded. The sources said the attack targeted a mosque in the camp as people gathered for prayer.

Yemen's president told the military on Sunday it needs to be on high alert and ready for battle. The attack "confirms without doubt that the Houthis have no desire for peace", Abd-Rabbu Mansour Hadi said, in a statement on Yemen's state news agency SABA.

Al Ekhbariya television quoted sources as saying the attack was carried out with ballistic missiles and drones.

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A proxy war has been playing out in Yemen between Iran and Saudi Arabia.

The Saudi-led coalition intervened in 2015 to restore the government of President Abd-Rabbu Mansour Hadi, which the Houthis ousted from power in the capital Sanaa and is now based in the southern port city of Aden.

The Houthis, who hold Sanaa and most of Yemen's big urban centres, deny being puppets of Iran and say they are fighting a corrupt system.

Houthi militants did not immediately claim responsibility for Saturday's attack. Previous missile attacks on military bases in Marib were claimed by the Houthi group.