He had been under surveillance for weeks by MI5 and the Metropolitan police over concerns he had been lured by violent extremism. Ali was last registered to an address in Enfield, north London, but is no longer resident there, according to official residence documents. Police also said that they had carried out two searches at addresses in London as part of their inquiries into Ali. Britain remains at a severe level of terrorism alert, meaning an attack is highly likely. The Guardian understands investigators believe both operations thwarted terrorist attack plots that they fear may have been imminent.

Source: The Guardian April 28, 2017 12:25 UTC