New Delhi, Oct. 1 -- Prime Minister Narendra Modi dialled US President Donald Trump on Wednesday to assess cooperation in key areas such as trade, energy and defence and to discuss regional and global issues against the backdrop of New Delhi's concerns over a US sanctions law on Russia. India has said the Lindsey O Graham Sanctioning Russia and Iran Act, which gives Trump the power to impose tariffs of up to 100% on the top five purchasers of Russian oil, can have implications for bilateral relations and the global energy market. Concerns about the US law have grown at a time when India and the US remain engaged in negotiations on a bilateral trade deal. Modi described his conversation with Trump in a social media post as productive and said they reviewed bilateral cooperation in trade, defence, energy, critical technologies and other areas. "We agreed to maintain close engagement to take our Comprehensive Global Strategic Partnership forward," he said. The two leaders also discussed regional and international issues, including ongoing efforts to advance global peace and security, Modi said. People familiar with the matter said the phone call was initiated by the Indian side. A readout from the Indian government said the two leaders reaffirmed their commitment to advancing the India-US Comprehensive Global Strategic Partnership and agreed to "maintain close engagement to deepen cooperation for the benefit of the people of both countries". The leaders agreed to remain in touch, the readout said. Modi and Trump last met on the margins of the G7 Summit in France in June, though they have spoken on phone several times this year. Concerns have grown on the Indian side over the new US sanctions law on Russia, especially because of the way the Trump administration has used tariffs since last year, when Indian goods were hit with 50% tariffs, including a 25% levy over Russian oil purchases. Russia has accounted for more than 50% of India's oil purchases in recent months....