Japanese police probe death threats against Caroline Kennedy
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Japanese police are investigating phone calls threatening to kill U.S. Ambassador Caroline Kennedy and Alfred Magleby, the U.S. consul general, an unnamed local police official told The Associated Press. 

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Local media reports indicated the death threats came from an English-speaking person on phone calls to the U.S. Embassy in Tokyo last month, according to CBS News.

The reports came as first lady Michelle ObamaMichelle LeVaughn Robinson ObamaWarren praises Ocasio-Cortez in Time 100 Beyoncé in 'Time 100' profile: Michelle Obama empowers black Americans Time 100 list almost half women for the the first time MORE was expected to arrive in Tokyo for a three-day visit.

Earlier this month U.S. Ambassador to South Korea Mark Lippert was injured in a knife attack by an anti-American activist and was released from the hospital after several days.

A request for comment from the State Department was not immediately returned. 

Kennedy, the daughter of former President John F. Kennedy, was appointed ambassador to Japan by President Obama in 2013.