But as of early Tuesday, the nearest crossing point, in Kuznica, in the northeast of the country, was closed.
The situation marks an escalation in months of migration pressure against Lithuania and Poland, and to a lesser extent Latvia, the three EU states on the blocâs eastern border with Belarus.
The migrants are mostly from Iraq and Syria, though some have come from Africa, seizing on the chance of a new migration route to enter Europe. Most seek to only pass through Poland to reach Germany or other countries in western Europe.
Poland has received strong signals of support and solidarity from the EU and EU member states and the United States as it faces its border crisis.
Germanyâs outgoing interior minister, Horst Seehofer, said on Tuesday that all EU countries âmust stand together, because (Belarusian President Alexander) Lukashenko is using peopleâs fates with the support of Russian President Vladimir Putin to destabilize the West.â He called for the European Commission to support Poland in securing the border.
âThe Poles have reacted correctly so far,â Seehofer told German daily Bild of Polandâs reinforcement of the border. âWe cannot criticize them for securing the EUâs external border with admissible means ⦠the Poles are fulfilling a very important service for the whole of Europe.â
Seehoferâs deputy, Stephan Mayer, told Bild that âGermany could send police very promptly to support Poland if Poland wants that.â
So far Polandâs ruling nationalists have refused help from Frontex, the EUâs border agency.