Tokyo ? Police arrested an extremist Thursday for sending his severed finger to the ruling party to protest the prime minister’s absence from a shrine on the anniversary of the end of World War II, officials and news reports said.

Yoshihiro Tanjo, a 54-year-old member of an ultra-right-wing group in Okayama, western Japan, was arrested on charges of threatening Prime Minister Shinzo Abe and his Liberal Democratic Party, a prefectural police spokesman said on customary condition of anonymity. He said no other details could be immediately released.

Kyodo News agency said Tanjo mailed his severed left pinky finger, a DVD showing the finger being chopped, and a protest statement to the LDP headquarters Aug. 16, the day after the anniversary of the war’s end.