Polish minister cautions sanctions are like 'nuclear weapons'

BERLIN (Reuters) - Polish Foreign Minister Radoslaw Sikorski has warned that sanctions against Russia - a measure Warsaw supports in retaliation for the annexation of Crimea - are better used as a threat than actually imposed.

Poland, which shares a border with Ukraine and Russia's Kaliningrad enclave and is a member of the European Union and NATO, has supported action against Moscow, including visa bans and asset freezes on people close to President Vladimir Putin.