Crawley murder investigators work with Portuguese police
Detectives from Sussex Police are working with the authorities in Portugal to try to trace the family of a man who was killed in Crawley.
Police said the Portuguese man was found in an alley off Haslett Avenue East at 03:25 GMT on Sunday.
Officers are questioning four people arrested on suspicion of his murder.
Three men, aged 23, 33 and 48, and a 22-year-old woman, all from Crawley, remain in custody.
The victim, who has not been named, was taken to the Royal Sussex County Hospital in Brighton, where he died.
Police said the post-mortem examination indicated that he was assaulted and suffered head injuries.
Det Ch Insp Jason Taylor, from the Surrey and Sussex major crime team, said: "We are still piecing together what happened on Saturday night and Sunday morning.
"We know that the victim has suffered a head injury but we still need to speak to anyone who can tell us how he suffered it.
"Our appeal remains for anyone who was in the area between 10:30 on Saturday and 03:25 on Sunday to contact us."
Crawley district commander Justina Beeken rejected the suggestion that the death was caused by the homeless camp at the industrial estate.
"I would like to reassure the community that we believe this incident is a one-off," she said.
"Although there have been a number of complaints about antisocial behaviour and street drinking in the area, it is very rare for there to be any violence there.
"We continue to work with the council, the Three Bridges Forum, the homeless people in the area and outreach services to try to deal with the issues in the area and to reduce the effect they can have on the rest of the community.
"There is still work to be done, but the issues are being dealt with."