Detectives investigating the murder of Sukhwinder Singh have repeated their appeal for information two years after his body was found at Epsom racecourse.

Police have posted a £10,000 reward for information about 27-year-old Sukhwinder's death.

Sukhwinder was married with three young daughters.

He left the Punjab in India in August 2005 to look for work in Europe, intending to send money home to his family.

About 7am on January 21, 2006, his body was found by a passerby at Epsom racecourse car park.

Detective Chief Inspector Mark Preston-Heard said police wanted to trace three Punjabi men they believe may have vital information about the case.

The first man understood to go by the name Amandeep Singh, but also known as Mahli or Navtej Singh Mahli, knew Sukhwinder and might have been a witness to the events leading up to his murder.

Amandeep Singh is around 5ft 9in, 32 years of age, and of medium build.

He is believed to have connections in Croydon, Southall, Hayes and Hounslow.

The second man is Rajinder Singh Buttar, who is in his mid-30s and might have been with Amandeep Singh, also witnessing the events leading up to Sukhwinder Singh's murder.

He is believed to have connections in the Croydon and Kingston areas.

With Rajinder and Amandeep was believed to be Amrinder Singh, also known as Monu, aged 25, who has connections in Thornton Heath, Norbury, Hounslow and Kingston.

All three are believed to have attended a party in a flat in Sandfield Road, Thornton Heath, during the evening of Friday, January 20, 2006.

Detectives suspect the murder might have followed an incident there.

Anyone with information should phone Surrey Police on 01483 639660.

Surrey Police have also set up a freephone number in India for anyone there with information about the case - phone 000 800 4401418 or email operation_isobar@surrey.pnn.police.uk By Daniel Knowles.