MOSCOW — Russians were caught meddling in the last United States presidential election, and have been accused of trying to influence other ballots, including this month’s elections for the European Parliament.

Now they have been caught red-handed rigging one of their own votes: that of “The Voice Kids,” a popular TV talent show in the country.

On Thursday, Channel One, the state-owned broadcaster, said in a news release that it was canceling the result of the show’s last season, because fan voting in the final round had been manipulated. There had been “massive automated SMS spamming” in favor of one contestant, Group-IB, a cybersecurity firm that had been commissioned to investigate the results, said in its own release.

They did not name the beneficiary of the cheating, but the contest’s winner was 10-year-old Mikella Abramova, the daughter of Alsou, a pop star with over two million followers on Instagram, and Yan Abramov, a wealthy banker.