Weasel hunting for baby rabbits

As I was walking past my lounge window, I noticed a weasel running around outside on the lawn, eagerly looking for something. I went outside and found a very small rabbit hopping on the lawn several meters away from the weasel. What caught my attention was how small it was. They don’t usually leave their den that young. It was so small that it was still unsteady on its legs. Had it been forced out of its den by the weasel?? I also found another baby rabbit a few meters away, possibly a sibling. That baby rabbit was not hoping, more like crawling on the grass. I realised later than it was a head injury. I did not interfere and left it alone (the other baby rabbit and the weasel had disappeared by that time) as not to upset the parents. Throughout the rest of the day, I kept checking on the baby rabbit from a distance, hoping that a parent would come and rescue it. They never came and the baby eventually died a few hours later. That’s when I found out that it had a very small wound on top of its head below one of the ears. The inside of the ear was bleeding. I wondered if it could have been pecked by a magpie?? But this is just speculation. I simply don’t know what happened. Could you guess what happened??