Mass murder committed with "blunt object"

Here is something that just happened in Australia:

The Lin family were bludgeoned to death at their home in the northern Sydney suburb of North Epping on Friday night.
Such was the violence of the attack, that blood spatter experts were still examining the scene on Monday, trying to map out the order of the murders.
Min Lin, 45, and his wife Yun Lee "Lilly" Lin, 43, were found dead in their bed. The bodies of their sons - Henry, 12, and Terry, 9 - were found in another bedroom that they shared.
The fifth victim was Mrs Lin's sister Yun Bin Yin, 39, whose body was found in the bedroom where she had been staying.
All victims were hit repeatedly to the head and upper body with a blunt object. . . . .

Thanks to Gus Cotey for the link.