One can tell this Akula II is INS Chakrafrom the India naval ensign flying above the fin/sail and probably (?) the badge on the front of the fin/sail.
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The US government may have provided information that India is breaking a nuclear submarine (SSN) technology agreement with Russia. If so, this may be a US attempt to drive a wedge between India and Russia. More specifically it may reduce the chances India may lease a second Russian SSN and reduce the chances of Russian assistance to India on future indigenous Indian SSNs, SSBNs and their SLBMs.
On November 7, 2017 US website Strategypage reported Russian suspicions that India is violating the INS Chakra (Akula II ex-Nerpa SSN) lease agreement. Russian authorities suspect India is revealing some Chakra nuclear submarine technology details to US naval personnel. Russia has attempted to prevent such "snooping" by stipulating that a Russian naval officer be aboard INS Chakra at all times.
Strategypage goes on to report:
“Russia is also believed to suspect that a growing number of Indian naval officers have become so dissatisfied with Russian ships and poor Russian workmanship and repairs that they might pass details of [INS Chakra] the Akula II India already has to U.S. Navy officers they work with.”
My searches so far haven't unearthed Indian or other US information to support Strategypage's (India violating Chakra lease agreement) report. Some details of Strategypage's report might have been inserted by the US Government as a small part of a campaign to cause political, strategic and economic friction between India and Russia.
BACKGROUND
The US is increasingly courting India, in part to separate India from Russia (India's largest supplier of arms). The US also wants to sell India several civilian Westinghouse nuclear power reactors to supply electricity. Russian company Rosatom (see same article) is a nuclear power reactor competitor to Westinghouse.
In August 2017 a continuing US/Boeing desire to sell F/A-18E/F Super Hornets to India was reported. Such US aircraft may eventually replace many of the Russian MiGs and Sukhois fighter/attack aircraft that India has been buying for decades.
India financed the completion of a Russian Akula II SSN Nerpa in the 2000s. Nerpa became Chakra on lease to India in 2012 (see right sidebar).
For several years India has expressed interest in financing the completion of a second Akula II (Project 971). Russia might then lease this second Akula II concurrently with INS Chakra or it may be delivered to India once Chakra's 10 year lease expires in 2022 (or a few years later).
At one stage India even hoped to lease one of Russia's late model Yasen SSNs. Russia quietly rejected this as Russia has too few Yasen SSNs to spare and Yasen technology is considered too sensitive to share with "lease" customers.
FURTHER COMMENT
Continuing Russian supply of weapons to India would be opposed by many in the US Government. But others would look forward to access to the latest Russian weapons' technological details once Russia sells or leases these weapons to India.
Pete