Police say a teenager has died of his injuries a week after he was assaulted in an Oshawa rooming house.

They say 19-year-old Tehganni Lewis died Saturday in what investigators are calling a culpable homicide.

Lewis was taken to hospital early in the morning of Jan. 23.

He was transported to a Toronto trauma centre and remained in critical condition until his death.

Police say a post-mortem will be scheduled in the next few days.

No arrests have been made and police are asking the public for help in identifying a suspect.