(VOVworld) – An unmanned drone was found early on Wednesday morning on the roof of the Japanese Prime Minister’s Office in Tokyo, NHK said on Wednesday.

Police and security officers investigate near an unidentified drone (covered under a cardboard) which was found on the rooftop of Prime Minister Shinzo Abe’s office in Tokyo. (Photo: Reuters/Kyodo)

The drone was about 50 centimetres in diameter and had four propellers and was carrying a small camera. Tokyo police haven’t found any explosives on the drone but there was a plastic bottle and a device used as a spotlight. Japanese Prime Minister Shinzo Abe is in Indonesia attending the Asian-African Conference.  His office in Tokyo, a 5-storey building with a helicopter airport on top, is where he works every day and is about 15 minutes walk from the Prime Minister’s official residence.