Poland has accused Belarus of continuing to bringing more migrants to its border despite clearing camps close to the frontier.
The European Union also accused Belarusian President Alexander Lukashenko of deliberately attempting to flood the bloc with migrants in retaliation for sanctions against the country.
The accusation suggests the crisis has not been resolved by an apparent change of tack by Minsk.
Polish Border Guard spokesperson Anna Michalska said that Belarus authorities were already trucking hundreds back and forcing them to try to cross in darkness.
“(The Belarusians) were bringing more migrants to the place where there was a forced attempt to cross,” Michalska said. “At the beginning there were 100 people, but then the Belarusian side brought more people in trucks. Then there were 500 people.”
When the migrants tried to cross the border, Belarusian troops blinded Polish guards with lasers, she told a news conference. Some migrants had thrown logs and four guards sustained minor injuries.
A state of emergency has restricted access to the border on the Polish side, making it difficult to verify her account.
Poland has earlier deployed 3,000 more soldiers to strengthen the border as tension mount between the two countries
More than 2,000 asylum seekers and refugees remained on Poland-Belarus borders for several weeks. This came after Polish authorities refused to let them in.
Their numbers have unprecedentedly risen over the past few weeks amid tension between Belarus and Poland.
