The Russian Foreign Ministry said Friday it summoned US Ambassador to Russia John Sullivan over the US meddling in the upcoming Russian parliamentary elections. According to the statement published by the ministry, Sullivan was summoned for a meeting with Russian Deputy Foreign Minister Sergei Ryabkov. During the meeting, the Russian side said it has irrefutable proof that US "digital giants" violated Russian legislation with regard to the preparation for Russian State Duma elections. The ministry further said it is inadmissible to interfere in Russia"s internal affairs. Tensions are high between Moscow and Washington over a range of issues, including claims of meddling in US elections and Russia"s human rights record. In May, Russia formally designated the United States an "unfriendly" state, barring its embassy from employing Russian nationals. — Agencies