PUMELELE GUMENGU
I could not see my colleague in the passage, it was dark but I could see him because of that window that was opposite that tank but he could not see me, but I could see him, he was still trying to locate where we were in the passage.  But at that time I was able to see him, that he had a handgrenade because of that window.  That is why I called out saying "grenade!" and then I went, I dived through the side of the kitchen and I heard a gunshot from my colleague and after that I heard the explosion of the handgrenade.