Woman charged with murder after man's death in Perth's south-east

The 49-year-old woman and the 51-year-old man, who detectives said were known to each other, were allegedly involved in an argument at a home on Dunnell Street in Maddington at 8.20pm.

Police said during the altercation the man received a stab wound to his leg before the woman left the scene.

The man was taken to Armadale Hospital by St John WA ambulance, where he died a short time later.

Police searched the area and found the woman nearby about 8.50pm.

The woman from Collie was charged with one count of murder.

She is due to appear in Perth Magistrates Court tomorrow.