New Delhi: A number of members of the US Congress raised with Foreign Secretary Vijay Gokhale the issue of India signing a deal with Russia for a nuclear submarine last week, official sources said on Saturday. Gokhale clarified that India finalised the deal for leasing of a nuclear-powered attack submarine from Russia and it was not an acquisition or a purchase, they said. However, the issue was not raised by the US administration during Gokhale’s three-day visit to Washington earlier this week. Some members of the Congress raised the issue as they have some mis-perception about it, the sources said.