Three people are still being held for questioning by police investigating the fatal stabbing of 33-year-old Robert McCartney near a pub in Belfast on Sunday night.
Three others who were arrested in connection with the death have since been released.
One man, who was detained on Monday, was released without charge last night.
Mr McCartney was from Mountpottinger Road in the nationalist Short Strand area of east Belfast. He was found unconscious in Cromac Street not long after a row in a bar on nearby May Street.
The father-of-two later died in hospital from stab wounds.
A second man injured in the same incident was taken to hospital with a stab wound.
Yesterday, police again appealed for anyone who was in the vicinity of Magennis's Bar around 10.30pm on Sunday evening to contact them.
