A man has been arrested following a crash in Keilor East that killed two people.

Detectives from the Major Collision Investigation Unit arrested the 21-year-old Delahey man on Thursday afternoon, and are in the process of seizing a vehicle from a car park on Taras Avenue, Altona.

The man is currently being interviewed by police.

The arrest comes over a week after Ivana Clonaridis, 18, and Harley Churchill, 19 died after their blue Holden ute plunged off a bridge and burst into flames during a drag race.