A man in his 60s suffered a fractured wrist when he was pushed to the floor after being confronted by two men at Spalding train station.
The attack happened after the man got off the train with members of his family at Spalding, having travelled from Peterborough, at about 1pm on Saturday February 22.
British Transport Police are looking for two men who are both described as white, with Eastern European accents, and who ran away from the station shortly after the assault.
PC Zak Stevens of British Transport Police Peterborough said: “The victim, a man in his 60s from London, had been travelling from Peterborough to Spalding with family members to go to a party.
“They were on platform two at Spalding when the victim was approached by two men, one of whom pushed him in the chest and caused him to fall to the floor, suffering a fractured wrist in the process.”
The first man police want to trace was about 6ft 2ins tall, slim build, bald and wearing jeans and a grey silk jacket.
The second man was 6ft, also slim build, with brown hair and also wearing jeans.
Police are looking at CCTV from the day and interviewing witnesses who were at Spalding train station around the time of the assault.
PC Stevens said: “We believe there were a number of people on the train service and at the station at the time who may have seen what took place.”
Anyone with information should call 0800 405 040 or Crimestoppers, in confidence, on 0800 555 111, stating incident LNA/B5 of March 2.