Authorities in Japan say the mayor of the southwestern city of Nagasaki has been shot and seriously wounded.
Police say Mayor Itcho Ito is undergoing emergency surgery after being shot in front of Nagasaki train station around 8 p.m. local time (1100 UTC).
Japan's Kyodo news agency says police have arrested the alleged gunman, Tetsuya Shiroo. It says the man admitted to shooting Mayor Ito and said he had trouble with the city office over public works biddings.
The news agency says the man is linked to a gang affiliated with Japan's largest organized crime syndicate, the Yamaguchi-gumi.
Ito is seeking a fourth term in Sunday's election.
Ito's predecessor as mayor was also shot.
In 1990, a member of an extreme right group shot and seriously wounded then-Mayor Hitoshi Motoshima after he said he believed that Japan's emperor was partially responsible for Word War II.
Some information for this report was provided by AP and Reuters.
