Prosecutors served new arrest warrants Monday on two arrested former senior officials of the Japan Dental Association over alleged hidden donations to the Liberal Democratic Party's largest faction.

Sadao Usuda, 73, and Hirotake Uchida, 63, were served the new warrants for suspected violations of the Political Funds Control Law through their political donations to the faction and to Yukihiro Yoshida, a former dentist and ex-member of the House of Representatives, sources said.

Usuda and Uchida were earlier charged with bribery.