HAVANA (AP) - President Barack Obama, traveling in Cuba, was briefed Tuesday morning on the Brussels attacks that killed dozens of people. The White House said U.S. officials were in contact with Belgian officials about the explosions at the Brussels airport and subway system.
At least one of the attacks was believed to be caused by a suicide bomber, and Belgium raised its terror alert to its highest level.
Last week U.S. Homeland Security Secretary Jeh Johnson said U.S. Homeland Security officials are constantly monitoring world events and evaluating if there is a need to either publicly raise the nation's security posture or issue another bulletin via the government's National Terror Advisory System.
Such a bulletin was issued in December advising the public that federal law enforcement was concerned about the possibility of homegrown violent extremists and terrorist-inspired individuals.
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