A man remains in custody in connection with the murder of north Belfast schoolboy Thomas Devlin.
The 15-year-old was stabbed in the back five times as he and two friends walked home along the Somerton Road on August 10th after buying sweets.
One of Thomas's friends was also injured by a single stab wound when they were approached by two males, believed to be in their late teens or early 20s, who had a dog with them. Two men and a juvenile were arrested following the murder but released without charge.
On Friday police said they wanted to speak to two teenagers who were in the vicinity of the Fort William Service Station on Antrim Road and on Somerton Park, a short time before Thomas was attacked.
The pair were in the area, possibly with two other youths, at about 11pm on August 10th. It is understood the youths were not suspects but may have information that could advance the inquiry.