Russian Foreign Minister Sergei Lavrov on Tuesday said the use of tear gas and water cannon by Polish forces to stop migrants entering from Belarus was "absolutely unacceptable."
"The behavior of the Polish side is absolutely unacceptable," he told a press conference in Moscow, citing "tear gas and a water cannon and shots fired above the heads of migrants towards the direction of Belarus."
Thousands of migrants have camped at the Poland-Belarus border in a crisis Brussels says was orchestrated by Minsk possibly with the backing of Moscow.
Minsk and Moscow deny the claims and Russia has stood by its ally in the stand-off.
Polish forces fired tear gas at stone-throwing migrants trying to cross the border from Belarus on Tuesday, Warsaw said.
Warsaw said a Polish police officer was seriously injured in the border clashes.
Polish border guards estimate up to 4,000 migrants are now camped out along its border with Belarus in increasingly dire conditions and freezing temperatures.
Most of the migrants are from the Middle East, with many from Iraqi Kurdistan.
Iraq's embassy in Moscow said Tuesday that it will fly out around 200 people from Belarus on Thursday.
Baghdad had earlier said it would organize repatriations on a "voluntary" basis.
At least 11 migrants have died on both sides since the influx started in the summer.
A Message from The Moscow Times:
Dear readers,
We are facing unprecedented challenges. Russia's Prosecutor General's Office has designated The Moscow Times as an "undesirable" organization, criminalizing our work and putting our staff at risk of prosecution. This follows our earlier unjust labeling as a "foreign agent."
These actions are direct attempts to silence independent journalism in Russia. The authorities claim our work "discredits the decisions of the Russian leadership." We see things differently: we strive to provide accurate, unbiased reporting on Russia.
We, the journalists of The Moscow Times, refuse to be silenced. But to continue our work, we need your help.
Your support, no matter how small, makes a world of difference. If you can, please support us monthly starting from just $2. It's quick to set up, and every contribution makes a significant impact.
By supporting The Moscow Times, you're defending open, independent journalism in the face of repression. Thank you for standing with us.
Remind me later.