Detectives investigating the murder of schoolboy Thomas Devlin have carried out several searches in north Belfast.
Thomas Devlin was murdered in a knife attack
The police said premises in the Mount Vernon and White City areas had been searched in connection with his death.
A number of items were removed for further examination. Police said the searches were part of an "ongoing and active inquiry".
Thomas, 15, was stabbed five times as he and two friends walked along Somerton Road on 10 August.
In September, the police confirmed the prime suspects in the investigation were two young men with a black and white dog.
Thomas, a student at Belfast Royal Academy, was a talented musician who played the horn at school.
He had just bought sweets from a nearby shop and was on his way home when he was stabbed in the back five times.
His 18-year-old friend was injured in the attack, but not seriously. A 16-year-old boy managed to escape.
A number of people detained for questioning about the murder were subsequently released without charge.
Thomas' mother Penny Holloway has said whoever attacked her son meant to kill him.