Sinkhole trashes sports ground

A series of sinkholes have opened up on the pitch of a Gaelic Football Club in County Monaghan, Ireland.

The sinkholes are thought to have been caused by the collapse of a mine beneath the ground.

Several pitches and the club house have been affected and the entire club has been closed.

But what is a sinkhole and where do they come from? Here's Naz with more...