Naturalized citizen from Afghanistan sought in blast

A device explodes as bomb squad tries to disable it near New Jersey station

Authorities are looking for a naturalized citizen from Afghanistan for questioning in a weekend explosion in a Manhattan neighborhood that injured 29 people as the governor conceded on Monday that investigators could no longer rule out international terrorism.

The man sought for questioning was identified as 28-year-old Ahmad Khan Rahami. New York Mayor Bill de Blasio said he could be armed and dangerous.