MOSCOW (AP) — Russia's prime minister has ordered preparation of retaliatory measures against several non-EU European nations that have joined the European Union's sanctions against Russia.

Dmitry Medvedev instructed officials Tuesday to consider counter-sanctions against the countries, which he didn't identify.

Iceland, Liechtenstein, Norway, Montenegro, Albania, Moldova and Ukraine joined the EU sanctions last week.

The U.S. and the EU imposed sanctions in response to Moscow's annexation of Crimea and support for pro-Russian insurgents in eastern Ukraine. The sanctions have cut Russia's access to capital markets and banned transfers of military and energy technologies.

A year ago, Moscow retaliated by banning many Western agricultural products. Last month, the Kremlin extended the ban following the EU's decision to extend its sanctions through January.

On Tuesday, Russia tightened controls on imports of cut flowers from the Netherlands, an EU member.

National veterinary agency Rosselkhoznadzor said checks have repeatedly found Dutch flowers infested with pests. Starting Monday, imports of Dutch flowers will be allowed only after passing lab tests.

Russia has been accused of using sanitary issues as a pretext for politically driven bans.