Ali Harbi Ali, arrested on suspicion of assassinating Tory MP Sir David Amess, was allegedly spotted in London, just hours before the fatal stabbing attack, Sky News has reported.
The broadcaster published CCTV footage depicting a man, believed to be Ali, walking slowly towards the Gospel Oak train station on Friday morning. The video was filmed from outside a convenience store on Highgate Road at 8:44 a.m. local time (7:44 a.m. GMT).
At the moment, investigators are trying to track Ali's movements before the assault, looking into whether the suspect boarded a train at the Gospel Oak station to travel to Leigh-on-Sea, Essex, where Amess was killed.
The 69-year old lawmaker was stabbed to death as he was meeting with voters at Belfairs Methodist Church. The suspect, Ali Harbi Ali, was identified as the son of Harbi Ali Kullane, PR chief of Somalia's ex-Prime Minister Hassan Ali Khaire. He was earlier referred to the government's Prevent programme for monitoring the "radicalisation" of youth but was reportedly never under investigation by police or MI5.
Investigators believe he acted alone, but additional details are still being sought.