Police are searching for, and appealing for public assistance to help locate, missing boy Jack.
The 10-year-old was last seen on Violet Street in Frankston on Thursday night about 8.30pm.
Although there is no suggestion of foul play, police and family do have concerns for his welfare due to his age.
Jack was last seen wearing a black t-shirt with a white motif, white shorts and black sneakers.
Police have shared an image of Jack in the hopes that someone may have information on his whereabouts.
Anyone who sights Jack is urged to contact Triple Zero (000).