Dozens of officers working to establish facts, police saypublished at 10:54 Greenwich Mean Time 22 December 2023
The authorities are now giving some more detail about the deaths of a man and his daughter in Klanovicky forest last week, which they say may be linked to Thursday's killings.
The lead investigator says police have dozens, if not hundreds, of people working on the case.
All people in the area at the time of the killings have been found and excluded as potential perpetrators, he adds.