The UAE said 45 of its troops were killed in Yemen and Bahrain said it lost five soldiers Friday, the deadliest day for a Saudi-led coalition battling Yemeni rebels.

The Yemeni government said an “accidental explosion” at an arms depot at a military base in the eastern province of Marib initially killed 22 Emiratis, with 23 wounded soldiers later dying of their injuries.

However, Yemen’s exiled presidency said the Bahrainis died in the same blast that killed the Emirati forces.

A total of 33 Yemeni soldiers and coalition forces were killed and dozens of people were wounded in the blast at the base in Safer, 250 kilometers from Sanaa, the pro-Hadi army command said.A

The Arab coalition has also sent in troops, with Saudi media reporting that roughly 1,500 soldiers, most from the UAE, had entered Aden. The UAE only confirmed last month that its troops were on the ground there.

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