Leytonstone tube station attack
On 5 December 2015, a man armed with what was described as a blunt 3-inch (7.5 cm) bread knife attacked three people at Leytonstone Underground station in East London. One of the three victims was seriously injured, and the other two sustained minor stab wounds.
Source: Wikipedia — Leytonstone tube station attack (CC BY-SA 4.0)