Explosion in Oslo - with teenager reportedly detained  Sky News'Explosion so loud, ears hurt': Blast reported in Oslo, Norway police find grenade on scene | What we know  Hindustan TimesExplosion in major European city as 13-year-old boy arrested in 'showdown between criminals'  Daily StarExplosion in major European city as cops arrest 1 & warn residents to stay away  The SunNorway police investigate explosion near Israeli embassy in central Oslo  The Jerusalem Post