(see related)An email
threatening Los Angeles schools arrived from a foreign country,
investigative sources told ABC News on Tuesday.
LA School Superintended Ramon Cortines said the threat was
explicitly aimed at "students at school".
Meanwhile in New York City, Mayor Bill de Blasio and Police
Chief William Bratton said officials there received the same
threatening email and assessed it as "not credible".
School districts throughout the country were targeted by
the threatening email, De Blasio and Bratton said.
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