A fourth suspect has been taken into custody today following an incident in Poplar on Friday evening where a man was found fatally stabbed in the back.
All four of the suspects were arrested on suspicion of murder. The victim was named earlier as Liam Hamilton.
More top news
Transport for London is not happy that its branding has been used.
If you've been anywhere near Trafalgar Square today you'll notice something different.
Look closely at this collection of images by photographer Jim Grover and you'll notice there's something missing.