A gang of miscreants stabbed Dihan indiscriminately near his residence at Shehora Munshibari, leaving him critically injured, said Khandaker Shaker Ahmed, officer-in-charge (investigation) of Kotwali Police Station.
Officers were called to Chestnut Avenue at around 10.50pm on Monday.
The victim is believed to be an 18-year-old man.
A 34-year-old woman was arrested at the scene on suspicion of murder.
A man thought to be in his 20s died in hospital after being attacked in Colindale, north-west London, while a woman in her 30s died at the scene of a stabbing in Brixton, south London. Raul Nicolaie, 26, was attacked at his home in Colindale, north London, on Sunday at 6pm and died in hospital.
SANA: Syrian air defenses repel strike on Shayrat air base in Homs
A local reporter for The Arab News said Israeli warplanes were spotted in Syrian airspace just before the missiles were reported. Up to 10 missiles were destroyed by the Syrian Armed Forces, a military source told Sputnik.
At least 37 people have been stabbed to death in the capital this year.
Police said his family were still being informed and that formal identification and a post-mortem would be arranged.
'The victim and the suspect are known to each other'.
Almost 60 people have been murdered so far in London this year - majority killed with a knife.