The Tokyo Metropolitan Police Department into political group Tsubasa no To on Monday over alleged campaign obstruction activities in the April 28 Lower House by-election vote in Tokyo.

MPD investigators raided the party*s headquarters in Tokyo*s Chiyoda Ward, as well the homes of party leader Atsuhiko Kurokawa and Secretary-General Ryosuke Nemoto.

The group is suspected of interfering with the campaign activities of by-election candidates in Tokyo*s No. 15 district 〞 corresponding to the city*s southeastern Koto Ward 〞 in violation of the election law.