Homicide Squad detectives have arrested a 51-year-old man following a fatal stabbing in Warrnambool last night, Victoria Police say.
Emergency services were called to the Cramer Street address where a man, aged in his 40s, was located with life-threatening injuries about 8.30pm.
He was taken to hospital where he later died.
Investigators arrested the Warrnambool man early this morning.
He remains in custody, assisting detectives with their enquiries.
Any witnesses or anyone with information is urged to contact Crime Stoppers.