Following a fast-moving investigation and manhunt, British police on Saturday arrested an 18-year-old man in connection with an attack the previous day on the London subway, in which at least 30 people were injured and authorities labeled as terrorism. Authorities said the man was arrested by Kent police in the port area of Dover on the English Channel. Police suspect he might have been seeking a boat out of England. Anna Wilkins 43, lives next to the house being searched. “I saw a young man come out of there with his bike a couple of times in recent weeks,” Wilkins said. The young man, whom she described as “Asian,” arrived at the house just a couple of months ago and lived with an elderly couple, believed to be British. It is unknown whether the young man described by Wilkins is the suspect arrested in Dover. I never spoke to him and only saw him when he left the house with his bike, but I was always suspicious of him,” Wilkins said. Deputy Assistant Police Commissioner Neil Basu called the arrest of the teen at the Dover port “significant” but cautioned that the investigation is ongoing. The man is being held for questioning under the Terrorism Act. “For strong investigative reasons, we will not give any more details on the man we arrested at this stage,” Basu said.