Navalny's widow, Yulia Navalnaya, attended the meeting as a guest, public broadcaster Polish Radio’s IAR news agency reported.
The Polish foreign ministry said the Foreign Affairs Council (FAC) meeting in the Belgian capital focused on "support for Kyiv in countering Russia’s attacks and the future reconstruction of Ukraine."
The EU's foreign policy chief, Josep Borrell, said the ministers sent "a strong message of support to freedom fighters in Russia" and "honoured the memory of Alexei Navalny."
Poland’s top diplomat Radosław Sikorski told reporters after the meeting that Navalny's widow appealed to the EU to impose sanctions on Russia in reaction to her husband's killing.
Sikorski said he declared Poland's support for the idea.
Borrell told the media earlier on Monday that EU member states were likely to come with new sanctions on Russia in response for Navalny's death.
At their meeting in Brussels on Monday, EU foreign ministers also talked about Belarus and intensifying repression against the country's civil society "as well as the Minsk regime’s ongoing activity to destabilise the security situation in the region," according to the Polish foreign ministry.
Borrell said in an X post that "the regime in Minsk continues to push the country away from the legitimate hopes and aspirations of Belarusians for freedom, sovereignty and democracy."
He added: "Repression must stop and justice must be done."
Monday's meeting in Brussels additionally discussed the situation in the Middle East and the Red Sea region, "where the Houthis continue to assault commercial vessels," the foreign ministry in Warsaw said.
Russia invaded Ukraine on February 24, 2022, starting the largest armed conflict in Europe since World War II.
Monday is day 726 of Russia’s war on Ukraine.
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Source: IAR, PAP, gov.pl