A man has been charged with murder in Sydney's south after punching and kicking an elderly man - sparking a "massive" heart attack - during an argument over water restrictions, police say.
A 66-year-old man was watering his front lawn, in Formosa Street, Sylvania, when another man, 36, who was walking past the house, challenged him about water restrictions.
The two argued and police said at one point the 66-year-old turned the hose on the other man, wetting him.
The 36-year-old attacked the older man, punching him, pushing him to the ground and then kicking him.
The older man then suffered a massive heart attack, an ambulance spokesman said.
"He was hit in the head [and then] he went into massive cardiac arrest," the spokesman said.
That is a high price to pay for a water fight. And the old guy was entitled to do what he was doing.