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An 18-year-old is the latest to be arrested on suspicion of murder in connection with the death of Kyle Yule.
He was arrested on Thursday and has since been released on bail until November 6.
It comes after police were called to East Street, Gillingham at 8.10pm on October 6 where 17 year-old Kyle had been stabbed. He later died in hospital.
A 17-year-old has also been charged with threatening a person with a bladed article in a public place following an incident on October 1.
Police have said this is connected to the alleged murder a week later.
He will appear at Medway Magistrates' Court tomorrow.
Last week, Victor Maibvisira appeared in court after being charged with murder and one count of affray.
The 19-year-old of St John's Road, Gillingham will appear at Maidstone Crown Court tomorrow.
The remaining five, aged between 15 and 20, have been released pending further enquiries.
Anyone with information is asked to call the appeal line on 01634 792209 quoting reference SI/XY/009396/17 or Crimestoppers anonymously on 0800 555111.