Different Variable Values in Same Blueprint

There are 3 enemies on the map and when I kill one, I want to kill them all.

For example:
There is a boolean value (IsAlive?) in enemyBP. When i shoot him, it becomes false and he dies. But i want to do that when i shoot one of them, make all values of them false. So i want to do kill all of them.

I tried a lot but i could not. Can someone help me about that?

When you enemy dies, they could just use GetAllActorsOfClass to get the others and kill them first.