An 18-year-old man was detained in Dover’s port area; a 21-year-old man was later arrested in Hounslow
British police on Saturday detained an 18-year-old man in the English Channel town of Dover in connection with the rush-hour bombing of a London subway train that left 30 injured, calling the arrest “significant” and saying the investigation was moving quickly.
The man was arrested in the port area of the town, a major hub for ferry transport between the U.K. and France about 80 miles from the capital.
Authorities were urgently tracking down leads in what they were treating as a terrorist attack, with London police saying they were searching a residential address in Surrey, southeast of the capital, and had evacuated the area as a precautionary measure.
It was unclear if the man arrested was the person believed responsible for the attack and a key question was the extent of any network behind the bombing.
Police late Saturday also arrested a 21-year-old man in Hounslow in west London, London’s Metropolitan Police said in a statement released Sunday morning.
Metropolitan Police Commissioner Cressida Dick said the investigation was fast-moving and that police were making “considerable progress.”
According to the SITE Intel Group, Islamic State claimed responsibility via its news agency, Amaq, saying it was carried out by a “detachment.” There was no independent indication of the group’s role.
In the Friday morning bombing, a homemade device partially…