Media crowds the vehicle which carries Yasuo Yamamoto, who admitted to landing a drone on the roof of the prime minister's office, in front of Obama Police Station in Obama, Fukui prefecture, western Japan Saturday, April 25, 2015. Japanese police arrested the man, officials said Saturday. Tokyo metropolitan police said the man turned himself in late Friday in Fukui police in western Japan. (Yohei Fukai/Kyodo News via AP) JAPAN OUT, MANDATORY CREDITTOKYO (AP) — Japanese police arrested a man who admitted to landing a drone with low level radioactive sand on the roof of the prime minister’s office to protest the government’s nuclear energy policy, officials said Saturday.