Police are searching for a teenager believed to be a person of interest in the shooting death of a 19-year-old man near Geelong on Saturday.

Authorities were called to a house in Dove Street, Norlane at 1.40pm following reports a man was shot and killed.

The 19-year-old man died at the scene. (9NEWS) (9NEWS)

When police arrived at the house they found 19-year-old Corio man Sam Birchell dead.

Police believe 17-year-old Hamlyn Heights teenager Brandon Robinson can assist with the investigation and have urged him to come forward.

Brandon is reportedly armed and dangerous and hiding in the Norlane area.