Cat in flowerpot
I went down this afternoon to look into this case and found this cat sitting in a flower pot on the top floor of the block. A few people said that a fellow resident owns a pet cat and two of them pointed me to the same unit (though no one was home when I went by).
Interestingly, people on the lower floors had not seen the cat - whereas the people on the upper floors had. The cat apparently runs into peoples' homes and also sleeps on the sofa of one particular family.