Five more boys have been arrested on suspicion of murdering a teenager.
Jacob Abraham, 15, was stabbed in a service road behind his home in Hurst Drive, Waltham Cross, Hertfordshire, on 7 December, hours after he had been distributing food to homeless people.
Three 14-year-old boys and two 15-year-old boys from London were arrested on Tuesday and taken into police custody.
A 14-year-old boy was arrested on suspicion of murder on 11 December and later released pending inquiries.
Hours before his death, Jacob had been distributing food to homeless people with his mother at their church in Edmonton.
The pair arrived back in Waltham Cross just before 20:30 GMT where the teenager received a number of phone calls and went out.
Some time before 21:30 GMT, he was fatally stabbed.
Police said he attempted to run home before he was found collapsed and dying by his 19-year-old brother.