A series of robberies across south east London saw three 14-year-old boys targeted on trains or at stations. 

Detectives are investigating three robberies or attempted robberies which all took place on Tuesday June 27, and are believed to have been perpetrated by the same two people. 

At around 4pm a 14-year-old boy was at West Dulwich station when he was approached by two other teens who engaged him in conversation. 

The pair then threatened the boy with violence before stealing his phone, British Transport Police (BTP) said. 

Then at around 4.45pm another 14-year-old got on a train at Beckenham Junction. 

After around five minutes the same two boys once again started a conversation with the victim before attempting to steal his phone, unsuccessfully this time. 

A few hours later, at 7pm, a third 14-year-old boy boarded at train at Catford Bridge. 

The same two boys pinned the victim at the back of the train and stole his phone after threatening him with violence, BTP said. 

Officers investigating the crimes have released CCTV images of young men they believe may have information that could help them. 

Anyone who recognises them is asked to contact BTP by texting 61016, or by calling 0800 40 50 40 quoting reference 2300073905. 

Information can also be given anonymously to Crimestoppers on 0800 555 111.