More than 35 people have been stabbed to death in the capital so far in 2018.
At 18:36 BST officers were called to a home in Sudbourne Road, where a woman in her 30s had been attacked.
'He was taken to a central London hospital where he was pronounced dead later that evening.
Dihan was the prime accused in Robin murder case filed with Kotwali Police Station past year, police said.
A 51-year-old woman was stabbed to death today in the Cambodia Town area of Long Beach, authorities said.
So far no one has been arrested in connection with the stabbing.
Officers are still in the process of informing the victim's next of kin of Monday night's stabbing, and formal identification and a post-mortem examination will take place in due course. He is in custody at a south London police station.
'The victim and the suspect are known to each other'.
Police received a report about a disturbance in the crime scene located along Pangilinan street where the two kids were reportedly heard crying.
Talk Radio presenter Cristo Foufas, who lives in the vicinity of where the young woman was stabbed, reported that up to 14 emergency vehicles attended the scene.
The latest two killings bring the number of suspected murders in the capital this year to 59.