What does it mean?
There are several people down.

Does it mean;
1. They are dead.
2. They are wounded.
3. They are dead and wounded.

Question

What does it mean?
There are several people down.

Does it mean;
1. They are dead.
2. They are wounded.
3. They are dead and wounded.

Answer

It can mean any of those three. It sounds like it might be the kind of emergency where you don't know yet who is dead and who is wounded. It means people are down on the ground because of their injuries.