To enhance its nuclear capability, Pakistan is developing non-strategic nuclear weapons and thus joining the ranks of countries like the United States and Russia, a leading American think-tank has said.
Pakistan has the world's fastest-growing nuclear stockpile and it could achieve 150-200 warheads in a decade despite the political instability in the country, two top American atomic experts have said.
Stockpiles of the nations that are not recognised as nuclear weapon states under the Nuclear Non-Proliferation Treaty -- India, Pakistan, Israel and North Korea -- are minuscule in comparison with those of Russia and the United States.
While Pakistan is estimated to possess 70-90 nuclear weapons, India is believed to have 60-80, claims Robert S Norris and Hans M Kristensen in their latest article 'Nuclear Notebook: Worldwide deployments of nuclear weapons, 2009'.
Pakistan has a nuclear weapon stockpile of 110 to 130 warheads, a rise from an estimated 90 to 110 in 2011, a US think-tank said on Wednesday.
The US assessment of nuclear weapons security in Pakistan appears to have changed considerably from confidence to concern, particularly as a result of the introduction of tactical nuclear weapons, the report said.
After nearly two decades of nuclear competition with Pakistan, India with the several long-range ballistic missiles in development is seemingly now paying attention to its future strategic relationship with China, a think-tank report has said.
India's nuclear strategy, which has traditionally focused on Pakistan, now appears to place increased emphasis on China, the two experts claimed.
"We estimate that Pakistan now has a nuclear weapons stockpile of 130-140 warheads. This stockpile exceeds the projection made by the US Defense Intelligence Agency in 1999 that Pakistan by 2020 would have 60-80 warheads," said the report released last month.