My comment:
(a) Voice of Russia is an official news agency of Russia.
(b) I fail to comprehend why Mr Milenin identifies Agni IV as ICBM, whose definition is a range of more than that.
Intercontinental ballistic missile http://en.wikipedia.org/wiki/Intercontinental_ballistic_missile
(a ballistic missile with a range of more than 5,000 km (3,100 miles) typically designed for nuclear weapons delivery; India has a series of ballistic missiles called Agni, of which the latest is Agni-V. On 19 April 2012, India successfully test fired Agni-V, a three stage solid fueled missile, with a strike range of more than 8,000 km)
(c) Wiki identifies
(i) Agni IV as IRBM (Intermediate-range ballistic missile, a ballistic missile with a range of 3,000–5,000 km), and
(ii) that both Agni IV and V are in the "testing," not "operational," stage. See the table in the introduction of
Agni (missile) http://en.wikipedia.org/wiki/Agni_(missile)
(d) The air distance between Harbin, China and Calcutta, India is 4,305 km or 2,675 miles.