A teenager was arrested in Brighton last night (Friday, July 2) in the murder investigation into a fatal stabbing in Croydon last week.

The 15-year-old boy was arrested on suspicion of murder in Brighton on Friday, and was subsequently taken to a local police station in East Sussex where he remains.

As the Croydon Guardian reported previously, the stabbing happened on the doorstep of a home on Bracken Avenue in Shrublands, Croydon in the early hours of Thursday morning, July 1.

Officers attended and found a 16-year-old male inside the address suffering from stab wounds.

They provided immediate first aid prior to the arrival of the London Ambulance Service and London’s Air Ambulance.

Paramedics arrived soon after but despite their best efforts he was pronounced dead at the scene at 1.34am.

His next of kin have been informed. A formal identification of the victim and post-mortem examination are expected in due course.

Police described the incident as "horrific" and said they were keeping "an open mind" regarding the motive behind the killing.

Detective Chief Inspector Dave Blair, of the Met’s Specialist Crime Command, said: "Despite this early arrest, we still want to hear from anyone who has information relating to this horrific incident.

"Have you heard something that could assist my officers? Did you see something that could help?

"If you know anything, no matter how small it may seem, please do the right thing and get in touch."

The murder investigation continues.

Anyone with information is asked to call the incident room on 020 8721 4961, call 101 or Tweet @MetCC quoting 249/1JUL.

Or to remain 100 per cent anonymous contact the independent charity Crimestoppers on 0800 555 111.