"We are interested in supporting Belarus, if deemed possible [by Belarus], in developing relations under the Eastern Partnership initiative," Poroshenko was quoted as saying by the press service.
The Ukrainian president pointed out that he was talking about using technology, law and finance to the mutual benefit of the countries.
Belarus' President Alexander Lukashenko said that Belarus was Ukraine's reliable and honest partner in both political and economic issues.
The Eastern Partnership initiative was launched in 2009 between the EU and the eastern European partner countries. It serves to strengthen political, economic and cultural ties between the EU and partner states.
On Saturday, Russian Foreign Ministry spokesperson Alexander Lukashevich said that Russia hoped the EU would consider the flaws of the Eastern Partnership initiative and was prepared to create a common economic and humanitarian space "from the Atlantic to the Pacific".