Investigators have determined the relationships between those involved in a stabbing incident in the Qualicum Beach area Friday.
Police say the suspect lived at the house with his sister and her husband, and another man involved in the incident was a visiting friend.
Just before 11 Friday night police and paramedics were called to the house where they found a 42 year old man with superficial stab wounds and a 29 year old man with stab wounds to his hands, chest and abdomen.
He was in critical condition and is now recovering in hospital.
The suspect was located outside and arrested without incident.