Polica

Slovenia has a plethora of karst caves but Križna Cave is one of the few that can be visited on a boat. The number of visitors is restricted and those wishing to see more than one lake should book well in advance.

According to the Associated Press, several people were attacked with a knife by a man, who was arrested.
Local police stated on Twitter that none of the injured suffered life-threatening injuries.
Police did not release details about the attacker, nor did they specify how many people were injured.