Poland has accused Belarus of trying to cause a violent provocation following reports that hundreds of migrants are attempting to cross Poland’s border.
Polish officials have said they are prepared to defend the frontier and have increased security measures, deploying more than 12,000 soldiers – up from the 10,000 that were there recently.
Migrants attempted to force their way through the barbed wire at a crossing in Kuznica, in the northeast.
The European Union has accused Belarus of engaging in a form of hybrid warfare by encouraging thousands of migrants from the Middle East and Africa to cross into EU countries via its borders.
The bloc perceives this to be an act of revenge for Western sanctions on Minsk over human rights abuses.