Police were called at 22:33 hours on Wednesday, 3 August to reports of a man seen in possession of a knife injuring people at Russell Square, WC1.
Officers attended the scene along with the London Ambulance Service.
Up to six people were found injured at the location.
A female (no further details) was treated at the scene but was pronounced dead a short time later.
We await an update on the condition of the other persons injured and details of any other injuries.
A man was arrested at 22:39 hours and a Taser was discharged by one of the arresting officers.
Additional police units have been deployed to the area to provide reassurance.
Anyone with information should contact police on 101 or call Crimestoppers anonymously on 0800 555 111.
+Terrorism is one possibility being explored at this stage.
