Speaking after holding talks in Warsaw with visiting Hungarian Prime Minister Viktor Orban, Morawiecki said: "Here, in Poland, it's we who decide who will come to Poland and who will not".
The move follows a decision by the Hungarian government to tighten a bill dubbed "Stop Soros" that would restrict the work of Hungarian non-governmental organizations that receive foreign funding.More news: Valeant shares surge 5% on Q1 revenue beat, higher guidance
Orban, who won a landslide victory in the April elections, has repeatedly accused Soros and his organization in support of migrants and undermining national culture.
The building that houses the Budapest offices of the Open Society Foundations in Budapest, Hungary.
What would the Stop Soros law do? .
In recent years, the fiercely anti-immigration Orban has waged a series of large-scale taxpayer-funded information campaigns attacking Soros, accusing him of being a "public enemy" plotting to change the cultural fabric of Europe. The liberal media has attempted to portray the Hungarian governments efforts against the foundation's activities, as anti-Semitic, referring to alleged similar activities prior to the Second World War.More news: Manu Samoa to face Germany or Portugal in World Cup playoff
"The Foundations will pursue all available legal avenues to defend the fundamental rights that are threatened by the legislation", OSF said in the statement, vowing to continue the organisation's work in Hungary through funding from the German capital.
The foundation backed by the Hungarian-born U.S. billionaire is set to move its staff to the German capital of Berlin.
Hungary and Poland hold similar positions on the European Union's new budget and oppose cutting funds for the common agricultural policy, the two prime ministers said on Monday.More news: Tim Allen's awful sitcom Last Man Standing is making a comeback