Mateusz Morawiecki made the remarks in a Facebook post late on Tuesday.
His post came after Washington and London earlier in the day announced sanctions against Russia over its aggression in Poland's eastern neighbour Ukraine.
Russian President Vladimir Putin a day earlier recognised two breakaway areas in eastern Ukraine as independent and sent Russian forces to the two separatist regions to carry out what the Kremlin described as “peacekeeping functions.”
Morawiecki wrote: “It’s been a very important day as the West consolidates itself in order to stop Russian designs on Ukraine.”
He added: “The US and Great Britain have just announced first sanctions packages, while Germany has halted the approval of the Nord Stream 2 gas pipeline.”
“It’s still not enough to contain the imperial ambitions of Vladimir Putin, but this first step is hugely important,” Morawiecki said.
He noted that there were “many challenges” ahead for peace and a "just international order" and added that Poland must work together with its allies and support its neighbour.
Biden, Johnson put sanctions on Russia over Ukraine
Earlier on Tuesday, US President Joe Biden announced a fresh slew of “full blocking sanctions” against Russia, news agencies reported.
The measures target two large Russian financial institutions, the country's sale of sovereign debt abroad, and Russia's "elites and their family members," according to news outlets.
Biden said that this was a “first tranche” and further sanctions would follow if Russian aggression continued to escalate.
Also on Tuesday, British Prime Minister Boris Johnson rannounced sanctions on five Russian banks and three wealthy individuals in response to Putin’s military move into Ukraine, Poland's PAP news agency reported.
He also warned of further “much, much tougher” action if the crisis heightened.
Earlier in the day, Germany’s Chancellor Olaf Scholz told reporters he had halted the certification of Russia's controversial Nord Stream 2 gas pipeline under the Baltic Sea in reaction to Putin’s moves in eastern Ukraine, news agencies reported.
Meanwhile, the European Union late on Tuesday agreed on a new package of sanctions against Russia over its aggression on Ukraine, the Reuters news agency reported.
The measures are set to blacklist politicians, lawmakers and officials, ban EU investors from trading in Russian state bonds, and target imports and exports with the separatist regions, according to the bloc’s officials.
The EU’s foreign policy chief Josep Borrell told a news conference the sanctions had been endorsed by the member states unanimously and would “hurt” Russia, Reuters reported.
(pm/gs)
Source: IAR, PAP, Reuters
Click on the audio player above for a report by Radio Poland's Michał Owczarek.