Poland's Prime Minister Mateusz Morawiecki announced the referendum question on social media on Sunday. Pic: AP
It comes as his conservative Law and Justice party bids to stave off a challenge from the opposition in a parliamentary election in October and suggests it is seeking to use migration in its campaign - a tactic that helped it take power in 2015. The Polish government wants to hold the referendum alongside the parliamentary election, scheduled for 15 October.
Party leader Jaroslaw Kaczynski then says:"Do you want this to happen in Poland as well? Do you want to cease being masters of your own country?"Leaders have announced two other questions in recent days on privatising state-owned enterprises and support raising the retirement age.