Sorry - bit of a weird one thing - but has anybody else had plants pulled out of planters in the area?

It has happened to us three times in the last 6 months or so, that flowering plants have been pulled right out of planters. In one case, they were left on the floor by the planter, and the other two times they disappeared completley.

It has happened both in the front garden, and back (which is not accessible other than through a high gate or the house).

I can't imagine that a cat or fox would do this? Would they?

Any ideas?!

thanks!