Thread:Dap00/@comment-14250-20130310235804/@comment-2074153-20130311051921

The dub specifies "terminated" in episode 33 but it's pretty clear the implication is they were killed. Kagami is the only demon he summoned that was specified to be any different or stronger than the others, and judging by how easily the ones you do see die were killed, I tend to think she was the exception rather than the rule.