Poland on Monday accused Belarus and Russia of arranging a new major migration wave to destabilize the border.
Polish Deputy Interior Minister Matej Vaszyk said border guards had asked the defence ministry to send a thousand more troops to the border, adding that it was "an operation arranged by Russian and Belarusian special services".
Tomasz Braga, head of Poland's border guard unit, said Belarusian services had turned into "an ordinary criminal group that organizes irregular migration".
He pointed out that 19,16 migrants have tried to enter Poland since the beginning of this year, compared to 2022,<> in <>.
Braga revealed a "record" was set last July, with more than 4,<> people trying to cross the border.
Warsaw and Western countries accuse Minsk of encouraging and regulating the flow of migrants by promising to facilitate their entry into the EU.
Belarusian President Alexander Lukashenko's government has denied the matter, accusing Poland of treating migrants inhumanely.
Relations between Minsk and Moscow improved further after the war in Ukraine began in February 2022, with Belarus providing its territory to the Russian army, and sharing with Russia Western pressure and sanctions, although it did not directly participate in the war.
More than a week ago, the Polish news agency reported that the army was moving military forces to the east of the country on the border with Belarus, attributing the reinforcements to potential security threats related to Russia's Wagner Special Military Group.
Recently, Belarus confirmed the deployment of fighters from the Wagner Group on its territory, saying they had begun training its army.
Poland has sent thousands of troops to help border guards tackle migrants and passed a law allowing migrants to be returned to Belarusian territory. It has also set up a special zone on the border, closed even to humanitarian NGOs and the media, drawing condemnation from human rights organizations.