A circuit court judge has strongly criticised the juvenile justice system as being incapable of dealing with violent young men who "prowl the streets taking their opportunities as they arrive".

Three men have been jailed for a total of 12 years for their parts in a brawl that led to two American tourists being beaten with glass bottles.

Three men who took part in a vicious attack in Dublin city centre on two US tourists who had tried to stop a robbery will be sentenced on Monday.

A court has heard how an American tourist still has glass embedded in his face after intervening in a robbery in Temple Bar in Dublin.