Arrest after drone with radioactive material lands on Japan PM's rooftop

A small drone covered with cardboard is seen on the roof of PM Shinzo Abe's official residence in Tokyo on April 22, 2015.

Tokyo (CNN)Japanese police have arrested a man after a drone with traces of radioactive material landed on the roof of Prime Minister Shinzo Abe's office.

Yasuo Yamamoto turned himself in and confessed to flying the drone, Tokyo metropolitan police said on Saturday.
The unemployed man was protesting the country's nuclear energy policy, according to the Kyodo news agency.
Drone found on roof of Japanese Prime Minister's office
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