Police are appealing for public assistance to help locate missing teenagers In-hwan Kim and Kendyl Millar.
The 16-year-old boy and girl respectively were last seen in Kolora yesterday about 11pm.
They are believed to be travelling together.
In-hwan is about 170cm tall, thin build and was last seen wearing a black hoodie, grey track pants and black skater shoes.
Police and family members have concerns for him due to his age and a medical condition.
Kendyl is about 170cm tall, thin build and was last seen wearing pyjamas.
Police and family members have concerns for her welfare due to her age.
Both teens are known to frequent Terang, Mortlake and Kolora areas.
Police have released images of In-hwan and Kendyl in the hope someone recognises them and can provide information regarding their current whereabouts.
Anyone with information about In-hwan and Kendyl is urged to contact Warrnambool Police Station on 5560 1333.