The European Union (EU) is set to impose sanctions on Belarus' airline and international firms involved in migrant trafficking, in response to the migrant crisis on the country's border with Poland.

European Council chief Charles Michel and European Commission president Ursula von der Leyen revealed details of the sanctions to Members of the European Parliament (MEPs) on Tuesday.

Von der Leyen accused the administration of Belarus president Alexander Lukashenko of instigating a "hybrid attack against the EU" by directing migrants from the Middle East towards Poland.

Western officials have accused Belarus of instigating the crisis by encouraging thousands of migrants fleeing poverty and war-torn areas to try to cross into Poland to undermine EU security.

The sanctions, von der Leyen added, will be coordinated with the UK, Canada and the United States.

(With input from agencies)