A 77 year old woman is in serious condition after a violent stabbing on Cumberland St. Its reported that Saturday morning a 29 year old man allegedly attacked 4 people with a weapon in a North side apartment. Police were able to control the man with a tazzer. One of the victims was treated with minor injuries on the scene, while two others were sent to hospital with non threatening injuries. The 77 year old woman remains in Thunder Bay hospital in serious condition. The man is in Police custody as the investigation continues.