Hawzah News Agency - Police say the man has been arrested by Kent police in the port area of Dover on the English Channel.

Deputy Assistant Police Commissioner Neil Basu says that it's a "significant arrest." He said the investigation is ongoing and the terror threat level remains at "critical."

The man is being held for questioning under the Terrorism Act. He has not been charged or identified, ABC news reported.

A bomb partially exploded on a London subway train at Parsons Green station Friday morning, leaving 29 people wounded, including those with burns and injuries from an ensuing stampede.uspect in Connection to

London Terror Attack.