Indoor cat caught a mouse last night?

[Niknaks1]

My indoor cat a mouse last night, I like in a first floor apartment so my neighbours above have issues with mice in there home and the same with my neighbours below me. I'm the only flat that has a cat, anyways last night he caught and killed a mouse.. haven't had an issue at all until now..
Iv got all foods stored in containers and my kitchen is always clean ect.. does this mean there's more mice? I'm not scared because I know my cat will catch and kill them but it is kinda freaking me out a little. Will my cat keep them away? Any advice would be appreciated.