Two men have been arrested over the death of a 21-year-old man who was fatally stabbed in Primrose Hill on Tuesday.
Student filmmaker Finbar Sullivan died after a fight at the popular north London viewpoint in the early evening.
A 27-year-old man has now been arrested on suspicion of murder and a 25-year-old man has been arrested on suspicion of assisting an offender, the Metropolitan Police said.
Both men remain in police custody.
Detective Inspector Andy Griffin, who is leading the investigation, said on Saturday: "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."
Anyone with information or footage of the incident has been asked to contact the Metropolitan Police.
Earlier this week, the force said it was aware of footage circulating on social media.
Mr Sullivan's father, Christopher Sullivan, previously told the Daily Mail his son had gone to Primrose Hill to use a camera he had received for his birthday.
"This is the worst tragedy I could ever imagine,x" he told the newspaper on Thursday.
"He's my only son… I had him when I was 45. He can never be replaced.
"He was the most beautiful, lovely, outgoing, loving boy. He was just a really lovely person."
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The 65-year-old added that his son had hoped to follow in the footsteps of his grandfather, cameraman Michael Seresin, who worked on films including Harry Potter and the Prisoner of Azkaban.
"We were just about to start a company together," Mr Sullivan continued. "He was going to do his showreel today with me. And now he's dead."
(c) Sky News 2026: Two men arrested over fatal stabbing of 21-year-old in London's Primrose Hill
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