British police said Saturday that a number of items have been recovered at the port of Dover following the arrest of a 18-year-old man over London tube bombing.
Metropolitan Police Deputy Assistant Commissioner Neil Basu said that officers had to partially evacuate the port of Dover following the "significant" arrest in the departure area.
A precautionary search of the port turned up "a number of items", Basu said. They were found following the arrest of the man "on suspicion of being concerned in the commission, preparation or instigation of acts of terrorism".
"We are still pursuing numerous lines of enquiry, and at great pace," Basu told reporters. "Our priorities are ... to identify and locate any other potential suspects."
A blast took place on a packed rush-hour carriage at Parsons Green subway station on Friday morning in London, leaving at least 29 people injured.
Police identified the explosion as a terrorist attack. The terror threat level in Britain has been raised to critical, which means a further terrorist attack may be imminent.