An investigation has been launched following the discover of seven dead kangaroos and a wombat in Royalla over the weekend.

Police believe the animals were deliberately hit by at least one vehicle along Valley and Shearer Drives in the early hours of Sunday morning.

Authorities are treating the incident as an act of serious animal cruelty.

Police are asking anyone with information that may assist their investigating to get in touch with Crime Stoppers on 1800 333 000.