Police said three people were arrested Sunday for defiling election posters for the Tokyo gubernatorial election.

In addition, police said there were a total of 133 cases involving potential electoral irregularities, which was 99 more than the previous election, Fuji TV reported Monday.

Of the 133 cases, three involved the tampering with an online site hosting a popular vote for one of the candidates in the election. Police sent three official warnings to the parties responsible.

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