POLICE want to speak to anyone who witnessed a violent robbery aboard a train in which two teenage victims were stamped on.
The 17-year-old boys were travelling between Brentford and Chiswick at around 8:30pm on March 8 when they were approached by four men offering to sell them drugs, which they declined.
The men became aggressive and violently robbed the boys of their phones before leaving the train at Chiswick.
British Transport Police (BTP) released CCTV images of the four men they believe have key information about the incident.
Detective Constable Mark Agrippa, from BTP, said: "What followed was an extremely violent attack on the victims. The boys were viciously punched and stamped on and ordered to empty their pockets of their wallets and phones.“The behaviour of the men was extremely intimidating and left both victims with injuries to their faces.
"Thankfully this kind of incident is rare on the railway network, but when it does happen, we will do all we can to track the offenders and bring them to justice."
Anyone who recognises the men pictured, or knows their whereabouts, should contact British Transport Police on 0800 40 50 40 quoting B7/LSA of 02/04/2013. Alternatively, contact Crimestoppers anonymously on 0800 555 111.