Do assasin snails eat each other

[Deepblue02]

I have 3 assasin snails in my tank to counteract a rising population in other snails but two of them are together but in an area of the tank i cannot see very well, are they attacking each other?

 

[sam24]

once they run out of other snails to eat they will eat each other.

 

[Fishfur]

If you don't have any other snails for them to eat, they will certainly prey on each other, and you will end up with only one eventually.