How do I remove this from the wall? (Pic attached)

[surreyisik]

Just trying to remove a mirror that was left by the previous owner. Managed to remove one by turning it counter clockwise with my fingers. The rest are turning forever but not coming off! Would be grateful for any advice

I think they press in on our one, so levering something under them (knife, end of tweezers, scissor blade) should make them pop off, then you can get at the screws.

Worked, thank you!!!