Norway arrests mother and three sons over bomb attack on U.S. embassy

Norwegian authorities have arrested a mother and her three sons in connection with a bomb attack on the U.S. embassy in Oslo. The explosion occurred on Sunday at approximately 1:00 a.m. local time near the entrance to the consular section of the American embassy. The blast involved a homemade explosive device but caused no injuries. Norwegian police have taken the four suspects into custody as they investigate the attack on the diplomatic facility.