Russia could site cruise missiles in Kaliningrad, the Russian enclave between Poland and Lithuania, if the US goes ahead with plans for a missile defence shield in central Europe, Russia’s first deputy prime minister warned on Wednesday.

The televised comments by Sergei Ivanov – a possible successor to President Vladimir Putin – came two days after Mr Putin proposed using a new radar station being built in southern Russia in place of a planned US radar in the Czech Republic. The proposal was made during informal talks with US president George W. Bush in Kennebunkport, Maine.