A 19-year-old man has joined a group of teenagers charged over an alleged kidnapping and death in Melbourne's northeast.
The South Morang teenager was taken into custody at Melbourne Airport on Friday.
He was charged with murder and kidnapping and has become the ninth teen charged over an incident earlier in the year.
A 25-year-old Thomastown man died after he was assaulted and stabbed at a home in Heidelberg West on October 16.
A 20-year-old man from Reservoir, who was allegedly kidnapped, was found inside a car left at the property.
Earlier in November, investigators charged four 17-year-olds and a 19-year-old with both murder and kidnapping.
Two 18-year-olds and a 16-year old were charged with kidnapping, while another 16-year-old was arrested but released pending further inquiries.
Five of the teenagers were arrested at Melbourne Airport.
Police say they are not looking for anyone else over the matter.