Detectives investigating the murder of a family man who they believe was in "the wrong place at the wrong time" are questioning five people.
David Woods, 51, was found with serious head injuries on a path behind the 53 Degrees nightclub, near the University of Central Lancashire in Preston.
Police said the attack came after two earlier altercations involving a gang of youths in the area on Friday.
Five people - three men and two women - are now being questioned by officers.
A woman was arrested on Sunday on suspicion of murder, a Lancashire Police spokesman said.
It means five people are now being held at Preston Police Station for questioning in connection with the death.
Officers still want to talk to students who may have been in the area at the time of the attack on Friday evening.
Det Supt Graham Gardner, leading the investigation, said: "What we do know is that there were at least two other altercations near to the students' union and the 53 Degrees Club around half an hour before the incident in which Mr Woods died.
"We urgently now need to hear from anybody who might have been the subject of these attacks, or any abuse from these people."
Earlier, the detective said Mr Woods had suffered an "unprovoked and serious attack".
"It seems to have been a case of someone being in the wrong place at the wrong time," he said.
Det Supt Gardner added officers were speaking with university officials in a bid to publicise what had happened.
CCTV footage from the area is also being examined in a bid to identify those responsible for attacking Mr Woods.
Mr Woods, a father-of-six, was pronounced dead at the scene of the incident on Friday night.
Police said he was attacked on a pathway between Fylde Road and Adelphi Street at about 1915 BST.