An 18-year-old man has been arrested in Dover on suspicion of a terror offence. It follows the Parsons Green underground train bombing in London on Friday 15th September.
Scotland Yard said that Kent Police detained the teenager in the port area of Dover this morning. The Metropolitan Police said that they will move the teenager to a police station in South London.
"We have made a significant arrest in our investigation this morning. Although we are pleased with the progress made, this investigation continues and the threat level remains at critical.
"The public should remain vigilant as our staff, officers and partners continue to work through this complex investigation. We are not, at this time, changing our protective security measures and the steps taken to free up extra armed officers remain in place.
"This arrest will lead to more activity from our officers. For strong investigative reasons we will not give any more details on the man we arrested at this stage."
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Police body cam footage captured the incident in Brighton in June 2013.