Detectives are continuing to appeal for information following the murder of a man in Hackney.
An investigation was launched after police were called at 17:48hrs on Monday, 8 January to reports of a man assaulted outside Burns House in Shakspeare Walk, N16.
Officers attended and found 34-year-old Daniel Frederick suffering from stab injuries.
He was taken to an east London hospital by the London Ambulance Service where he died at 23:47hrs.
Next of kin have been informed.
A post-mortem examination took place at Poplar Mortuary on Wednesday, 10 January and gave cause of death as a stab wound.
Detectives from the Homicide and Major Crime Command are investigating.
A 26-year-old man was arrested on the evening of Wednesday, 10 January on suspicion of murder. He was taken to an east London police station and has since been released under investigation pending further enquiries.
Detective Inspector Paul Considine, who leads the investigation, said: "While we have made an arrest, this investigation continues at pace and work continues to identify all those involved in this attack on Daniel.
"This was a senseless attack and I am appealing to anyone who was in the area of Shakspeare Walk around the time of the incident to contact police and provide us with any information that could assist this investigation."
Anyone with information is asked to contact the incident room on 020 8345 3734 - you can also tweet information to @MetCC.
Alternatively, contact Crimestoppers on 0800 555 111.