Det Insp Andy Griffin said: “My thoughts remain with Finbar’s family who continue to receive support from specialist officers at this unimaginably difficult time.
“Although we have made two arrests, my officers continue to work around the clock to trace everyone involved.”
He thanked members of the public who have already come forward and urged anyone with information or footage from the area on the day of the attack to get in touch.
“In the meantime, residents can expect to see an increased police presence as dedicated local officers continue patrols in Primrose Hill and the surrounding areas,” Griffin added.
