The Kremlin has also suspended a series of nuclear pacts, including a symbolic cooperation deal to cut stocks of weapons-grade plutonium. Just days ago, it was reported that Russia had moved nuclear-capable missiles near to the Polish border as tensions escalated between the world’s largest nation and the West.The Iskander missiles sent to Kaliningrad, a Russian enclave on the Baltic Sea between Nato members Poland and Lithuania, are now within range of major Western cities including Berlin.Polish officials – whose capital Warsaw is potentially threatened – have described the move as of the 'highest concern'. Putin's decision to cancel his Paris visit came a day after French President Francois Hollande said Syrian forces had committed a 'war crime' in the battered city of Aleppo with the support of Russian air strikes.Putin had been due in Paris on October 19 to inaugurate a spiritual centre at a new Russian Orthodox church near the Eiffel Tower, but Hollande had insisted his Russian counterpart also took part in talks with him about Syria.The unprecedented cancellation of a visit so close to being finalised is a 'serious step... reminiscent of the Cold War', said Russian foreign policy analyst Fyodor Lukyanov.'This is part of the broader escalation in the tensions between Russia and the West, and Russia and NATO,' he told AFP.The Kremlin has also been angered over the banning of the Russian Paralympic team from the Rio Olympics amid claims of state-sponsored doping of its athletes.