Even as the Trump-Modi summit went on Tuesday, US authorities raised concern before Indian officials about the presence of top Crimean leaders in India, ToI has learnt.The US pointed out to India that deputy PM of Crimea Georgy Muradov and finance minister Irina Kiviko, currently on a visit to India, were both placed under sanctions by the US in 2016 for "asserting governmental authority over a part or region of Ukraine without the authorization of the Government of Ukraine".What seems to have aggravated US concerns is that not only the 2 individuals are under US and also, as a European diplomat told ToI, EU sanctions, they also landed here in the middle of the Trump visit. Muradov is of particular concern to the US as he's additionally designated for being responsible "for or complicit in, or having engaged in, directly or indirectly, actions or policies that threaten the peace, security, stability, sovereignty, or territorial integrity of Ukraine".An Indian government source said that while the US had raised concerns, it had to be noted that both the ministers were here only on an "unofficial" visit and that no Indian leader or senior government official was going to have any meeting with them during their 2-day visit to India.ToI had first reported about the visit of Crimean ministers on Monday.Their visit though, even if unofficial, helps India walk the diplomatic tightrope with Russia. It yet again confirms that India will continue to stand by Moscow on the Crimea issue despite its ties with the US. President Vladimir Putin has in the past expressed appreciation for what he calls restrained and objective position of India on Crimea. The US maintains that Russia continues to violate international law on the Crimea issue and that it will go on sanctioning those who threaten Ukraine's security and sovereignty.Few Crimean political leaders have visited India though since it was annexed by Russia in 2014. The head of the Republic of Crimea , Sergey Aksyonov, created quite a sensation later that year after he apparently managed to inject himself into Putin's delegation to India. The State Department had then said in a reaction that while the US was troubled by Aksyonov's presence in India, it was possible that India wasn't aware of his presence in Putin's delegation. The US had then also approached India for a clarification.The 2 Crimean ministers arrived in India Tuesday and are visiting Delhi and Mumbai. According to the Russian embassy, the Crimean delegation is on a "working visit" to India"Meetings with representatives of the Indian business and public circles, students and Russian language teachers were held in a friendly and constructive atmosphere as has been a tradition between the two countries. Opportunities with potential for the development of economic, trade and investment cooperation with the Peninsula were presented," said the embassy in a statement.