Two men arrested in connection with the murder of a 17-year-old boy in Reading have been released without charge.
Robert Spence, of Burghfield Common, Berkshire, died from a stab wound in a suspected gang fight.
On Wednesday afternoon a 26-year-old man and a 27-year-old man, both of High Wycombe, Buckinghamshire, were released by police.
On Friday, one week on from his death, officers will be in Reading to hand out leaflets appealing for information.
Det Ch Insp Stan Gilmour, of Thames Valley Police, said: "We will be carrying out anniversary checks in the St Mary's Butts area
"We are actively pursuing a number of lines of inquiry, however, our investigation is at an early stage and it is vitally important that anyone who was in Reading in the early hours of last Friday morning... contacts the incident room as soon as possible."
Police suspect Robert died following a street fight between two gangs.
Post-mortem tests revealed he suffered from a single stab wound to the heart. Two other men were taken to hospital.
On Monday Robert's mother, Sandra Blake, said: "He was a hard-working boy, very helpful and always smiling.
"He wasn't a trouble-maker. He was well-mannered and respectful to others."
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