A 45-year-old woman has been charged with murder after a man died at a house in Hamilton early on Wednesday morning.
Police were called to an address on Cranmer Close, Rototuna at 2am, Detective Senior Sergeant Scott Neilson said.
There they found the man in a critical condition. Attempts by police and ambulance staff to resuscitate him were unsuccessful.
Police earlier said they would have a "significant" presence in the area while inquiries were made.
Neilson said the man and woman knew each other.
"Police are speaking with those involved and are offering support to the victim's family."