Police are appealing for public assistance to help locate missing 12-year-old Waiora Hura and 14-year-old Taonga Hura.
Wairoa and Taonga were last seen on 9 September 2019 in the Doveton area.
Police have concerns for their welfare due to their age and the length of time they have been missing.
They are known to frequent the Doveton and Eummerring areas.
Police have also released an image of Waiora and Taonga in the hope someone recognises them and can provide information regarding their current whereabouts.
Anyone with information about Wairoa and Taonga Hura are asked to contact Narre-Warren Police Station on 9705 3111.