A small drone bearing a trace of radiation has been found on the roof of the Japanese Prime Minister''s office on Wednesday, local media reported.

According to the police, the drone is about 50 centimeters in diameter, carrying four propellers and a small camera as well as a 10-cm brown bottle of liquid with a sticker showing a radioactivity symbol and the word"radioactive,"said Japan''s Kyodo News Agency.

The police later detected radioactive cesium in the liquid but no injuries were reported in the incident.

Top government spokesman Yoshihide Suga declined to comment on this, saying authorities are investigating the case. 轴承展-2017年广州国际轴承及其装备展览会-2017 China(Guangzhou) Int’l Bearing and Equipment Exhibition
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