A gang of up to ten teenagers kicked and stamped on a 14-year-old boy during a brutal and cowardly attack at Milngavie train station.
The apparently random assault happened around 8pm on Saturday last week.
The victim suffered a black eye, cuts and bruises.
British Transport Police, who are hunting the culprits, say the attack was unprovoked.
The culprits, both male and female, were in their mid to late teens.
Anyone with information is urged to contact British Transport Police by calling 0800 40 50 40, quoting reference 552 of November 4, or contact Crimestoppers anonymously on 0800 555 111.