U.K. lowers threat level; second suspect nabbed

LONDON—British police made progress Sunday in their frantic pursuit of suspects and evidence connected to the bomb that partially exploded on a packed London subway, leading counter-terrorism officials to lower the country’s threat level because they no longer considered a fresh attack to be imminent.

Home Secretary Amber Rudd announced the downgraded terror threat level hours after London police said a second suspect was in custody and a second property was being searched in connection with Friday’s attack that injured 30 people.

Rudd cautioned that the investigation was ongoing and that Britain still faced a substantial threat even though the terror level had been reset to “severe” from “critical.”

“Severe still means that an attack is highly likely, so I would urge everybody to be vigilant but not alarmed,” she said.

The fact that a second person—a 21-year-old man—was arrested under the Terrorism Act offered the clearest proof yet that police and security services believe the subway bombing was not just the work of one person.

The first suspect, an 18-yearold man, was arrested early Saturday in the departure area of the port of Dover, where ferries leave for France on a regular basis. The second was arrested in Hounslow in west London shortly before midnight Saturday.

Both were questioned Sunday at a south London police station. They have not been charged or identified.

The subway bomb caused limited casualties because it failed to completely explode.

Associated Press n Travellers walk on the platform Sunday at the Parsons Green tube station in London. A manhunt has been under way after an improvised explosive device was detonated on a crowded subway car, injuring at least 29 people.