A Perth teenager has had her charge upgraded to murder over the alleged bashing of her grandfather in Western Australia's south-east.
Police allege the 89-year-old man and 18-year-old woman were involved in a fight at a home on Randell Street in Esperance on Tuesday afternoon.
The elderly man was taken to Esperance District Hospital with head injuries, and died a short time later.
An 18-year-old has been charged with murder.(9NEWS)
Esperance is about 720 kilometres south-east of Perth.
Major Crime Squad officers from Perth are investigating.
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