Man charged with killing baby son in suburban Perth - ABC News & Headlines – Australian Broadcasting Corporation

Matthew Wayne Winmar (right) was arrested by police in Katanning in WA's Great Southern yesterday. (Supplied: WA Police)

A 23-year-old man accused of killing his five-week-old baby son in Perth's north-east has appeared in court. 

Matthew Wayne Winmar was charged with manslaughter after allegedly inflicting serious injuries on the infant at a residence in Kiara on August 10.

He was taken to a nearby medical centre, before being transferred by ambulance to Perth Children's Hospital.

The baby died on August 15 as a result of his injuries.

Mr Winmar was arrested at a home in Katanning yesterday, and was also charged with assaulting a woman aged in her 20s who was known to him.

Police have charged Mr Winmar with manslaughter and assault after his arrest in Katanning. (Supplied: WA Police)

He was charged with two counts of common assault in circumstances of aggravation or racial aggravation. 

Both incidents are being treated as family violence-related.

Mr Winmar has appeared in Perth Magistrates Court and made no application for bail. 

He is scheduled to appear in Stirling Gardens Magistrates Court later this month.