Again, reports about the Akula lease deal are unconfirmed and are mainly based on the fact that Russia will train Indian submariners at its training base Sosnovy Bor. The reports are also fuelled by statements like the following (but even here there are many caveats ):

Nuclear subs on lease from Russia to India

ST. PETERSBURG—The construction of a training centre for the Indian military in Sosnovy Bor, 70 kilometers west of St. Petersburg, confirms Russia’s intentions to lease nuclear submarines to India, said Green World Chairman Oleg Bodrov. … According to the spokesman [of the Sosnovy Bor administration], the new building will not house any special equipment or installations—such as nuclear reactors—but is only a wing for classrooms and has no relation to the nuclear industry … Representatives of the Russian Ministry of Foreign affairs and the Ministry of Defense said they were not ready to comment on the potential nuclear submarine leasing … Russian Navy Chief Admiral Vladimir Kuroyedov announced in early 2002 his readiness to lease two nuclear submarines to India. It was planned that the first sub would to India in 2004. But the Indian side did not follow up with any official commentary to Kuroyedov’s words.
Discussion of this contract was again taken up in the press toward the beginning of last year, but is was denied by Russian Defense Minister Sergei Ivanov.

source: http://www.bellona.no/en/international/russia/nuke-weapons/nonproliferation/39412.html