Polish police officers stand guard at Kuznica - Bruzgi checkpoint, as hundreds of migrants gather on the Belarusian side of the border with Poland in an attempt to cross it, Poland, November 16, 2021. Policja Podlaska/Handout via REUTERS

Migrants take cover from smoke as they attempt to cross the Belarusian-Polish border at Bruzgi - Kuznica checkpoint in the Grodno region, Belarus November 16, 2021. Leonid Scheglov/BelTA/Handout via REUTERS

Polish law enforcement officers take cover behind a fence, as migrants throw stones in an attempt to cross the Belarusian-Polish border at Bruzgi - Kuznica checkpoint in the Grodno region, Belarus November 16, 2021. Leonid Scheglov/BelTA/Handout via REUTERS

A man throws a stone in the direction of a border fence and Polish law enforcement officers, as migrants attempt to cross the Belarusian-Polish border at Bruzgi - Kuznica checkpoint in the Grodno region, Belarus November 16, 2021. Leonid Scheglov/BelTA/Handout via REUTERS

Polish law enforcement officers stand guard behind a fence, as migrants attempt to cross the Belarusian-Polish border at Bruzgi - Kuznica checkpoint in the Grodno region, Belarus November 16, 2021. Leonid Scheglov/BelTA/Handout via REUTERS

Polish police officers stand guard at Kuznica - Bruzgi checkpoint, as hundreds of migrants gather on the Belarusian side of the border with Poland in an attempt to cross it, Poland, November 16, 2021. Policja Podlaska/Handout via REUTERS

A Polish service member sprays liquid behind a fence, as migrants attempt to cross the Belarusian-Polish border at Bruzgi - Kuznica checkpoint in the Grodno region, Belarus November 16, 2021. Leonid Scheglov/BelTA/Handout via REUTERS

Migrants stand amid smoke in front of a fence on the Belarusian-Polish border at Bruzgi - Kuznica checkpoint in the Grodno region, Belarus November 16, 2021. Leonid Scheglov/BelTA/Handout via REUTERS

Polish law enforcement officers stand guard behind a fence, as migrants attempt to cross the Belarusian-Polish border at Bruzgi - Kuznica checkpoint in the Grodno region, Belarus November 16, 2021. Leonid Scheglov/BelTA/Handout via REUTERS

Polish law enforcement officers use water cannons, as migrants carry a log towards a fence at Kuznica - Bruzgi checkpoint, Poland, November 16, 2021. Policja Podlaska/Handout via REUTERS

Polish law enforcement officers use a water cannon on migrants, who attempt to cross the Belarusian-Polish border at Bruzgi - Kuznica checkpoint in the Grodno region, Belarus November 16, 2021. Leonid Scheglov/BelTA/Handout via REUTERS

A still image, taken from a handout video released by the Belarusian Telegraph Agency, shows Polish law enforcement officers using a water cannon on migrants, who attempt to cross the Belarusian-Polish border at Bruzgi - Kuznica checkpoint in the Grodno region, Belarus November 16, 2021. Picture taken with a drone. Belarusian Telegraph Agency (BelTA)/Handout via REUTERS

A man breaks a fence, as migrants attempt to cross the Belarusian-Polish border at Bruzgi - Kuznica checkpoint in the Grodno region, Belarus November 16, 2021. Leonid Scheglov/BelTA/Handout via REUTERS

A still image, taken from a handout video released by the Belarusian Telegraph Agency, shows Polish law enforcement officers using a water cannon on migrants, who attempt to cross the Belarusian-Polish border at Bruzgi - Kuznica checkpoint in the Grodno region, Belarus November 16, 2021. Picture taken with a drone. Belarusian Telegraph Agency (BelTA)/Handout via REUTERS

Polish law enforcement officers use a water cannon on migrants, who attempt to cross the Belarusian-Polish border at Bruzgi - Kuznica checkpoint in the Grodno region, Belarus November 16, 2021. Leonid Scheglov/BelTA/Handout via REUTERS

A migrant reacts near a fence on the Belarusian-Polish border at Bruzgi - Kuznica checkpoint in the Grodno region, Belarus November 16, 2021. Leonid Scheglov/BelTA/Handout via REUTERS

Polish law enforcement officers stand guard at Kuznica - Bruzgi checkpoint, as hundreds of migrants gather on the Belarusian side of the border with Poland in an attempt to cross it, Poland, November 16, 2021. Policja Podlaska/Handout via REUTERS

A man runs away from a water cannon used by Polish law enforcement officers, as migrants attempt to cross the Belarusian-Polish border at Bruzgi - Kuznica checkpoint in the Grodno region, Belarus November 16, 2021. Leonid Scheglov/BelTA/Handout via REUTERS

Polish law enforcement officers stand guard behind a fence, as migrants attempt to cross the Belarusian-Polish border at Bruzgi - Kuznica checkpoint in the Grodno region, Belarus November 16, 2021. Leonid Scheglov/BelTA/Handout via REUTERS