Police Commissioner Mike Bush wraps up his brief police statement.
Mr Bush says the death toll has now risen to 49.
One man in his 20s has been charged with murder and will appear in court tomorrow. The involvement of three others detained is as yet unclear.
The commissioner confirmed none of the people arrested were on watchlists.
Mr Bush ended the briefing by reassuring the public that police eyes are “wide open”.
“We are on top of this,” he said.