Two countries remained to be convinced, Radosław Sikorski added.
On May 21, the Council of the European Union approved a plan for profits generated from frozen Russian state assets to be allocated to support Ukraine.
These funds will be transferred to Kyiv through a specially established Ukraine Assistance Fund.
Sikorski underscored the urgency for Ukraine to receive these frozen assets promptly to purchase weapons.
Speaking during an interview with Polish private radio broadcaster RMF FM on Thursday, Sikorski said that the first tranche of interest payments from the frozen Russian assets was expected to reach Ukraine next month.
He emphasized the need to "leverage future interest payments so that Ukraine can receive a large tranche of money next year."
After that, "the focus will shift to the frozen capital itself," he told RMF FM.
The frozen Russian assets, valued at around EUR 300 billion, will remain inaccessible until Russia compensates for the destruction caused in Ukraine.
The World Bank estimates that rebuilding Ukraine will cost around USD 500 billion.
Poland threatens to block key Chinese rail export route to EU: Bloomberg
In addition to the financial discussions, Sikorski addressed the situation at the Polish-Belarusian border. He noted a slight decrease in illegal border crossing attempts but warned that "the Russian and Belarusian regimes turn this flow of illegal migrants on and off based on political directives."
Regarding whether Poland should close its border with Belarus, Sikorski stated that it is Poland's sovereign right.
"Most border crossings are already closed," he said. "The [Lukashenko] regime may leave us with no other option."
When asked if Poland should exert more influence on China to discipline Belarus, Sikorski responded that "the Chinese side has expressed its concern to Belarus about the state of border security in terms of both cargo and people crossing it."
The Bloomberg news agency reported on Wednesday that during a recent visit to Beijing, Polish President Andrzej Duda threatened to block a key Chinese rail export route to the EU due to the escalating migration crisis on its eastern border with Belarus.
(rt/gs)
Source: PAP