A drone equipped with a camera was found on Wednesday on the roof of Japanese Prime Minister Shinzo Abe’s residence in Tokyo, though the origin and purpose of the drone remain unknown, Tokyo police reported.

The gadget, with a 50-cm wingspan, apparently fell on the roof of Kantei, the prime minister’s residence in Tokyo’s Chiyoda district, where it was found by security staff, Efe news agency reported.

Mr. Abe is currently in Jakarta, Indonesia, attending the Asian-African Conference.

Authorities examined the drone and found it free of explosive material.

In a similar incident in January, a drone fell into the White House lawns in Washington D.C.

In France, authorities have confirmed around 60 overflights of unauthorised drones over nuclear facilities, military bases and embassies.