Israel woke to news of tragedy on Wednesday after a training accident in the Golan Heights left two IDF soldiers dead, and another four wounded.
An army spokesman later reported that a self-propelled artillery gun had flipped over after firing and crushed six soldiers.
Of those who later succumbed to their injuries and died was the platoon commander.
"This was a very serious and painful incident," IDF Spokesperson Brig.-Gen. Ronen Manelis said.
The army has opened multiple investigations into this and other fatal training accidents of late.
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