Shaun Chambers 'died after being stabbed in heart'
A man killed in a double stabbing died from a single wound to the heart, police have said.
Shaun Chambers, 21, was found in Walworth, south-east London, on Wednesday with an 18-year-old, who had also been attacked.
They were taken to hospital but Mr Chambers, from Greenwich, later died. The other victim was later discharged.
A 21-year-old has been arrested and the incident is being linked to a third stabbing on the same day.
A 20-year-old had been stabbed in the Old Kent Road and was taken to hospital where he discharged after receiving treatment.
Four men previously arrested in connection with the investigation and have released on police bail.