CCTV images have been issued of two suspects wanted in connection with a robbery which took place at Bookham railway station.
Cash and a valuable mobile phone were taken from a man and a woman in the incident, which occurred at around 7.45pm on December 13.
Detective Constable Sam Painter said: "Two men approached a man and woman and tried to start a conversation with them.
"The pair soon turned aggressive and ordered the couple to hand over their belongings.
"Frightened and intimidated, one of the victims handed over their mobile phone, a purple Blackberry Curve worth £250, while the other gave a small amount of cash."
Det Con Painter added: "We are following a number of leads including interviewing witnesses but, at this stage, I am appealing for members of public who may have seen something to come forward.
"We are particularly keen to speak to these two men, or anyone who recognises them, as a matter of urgency."
Anyone with information should contact British Transport Police on 0800 40 50 40 quoting B7/LSA of 15/01/13 or call Crimestoppers anonymously on 0800 555 111.