A parliamentary anti-crisis coalition, formed in June and comprising the Party of Regions, the Socialist Party and the Communist Party, has for the past two weeks been engaged in intensive consultations with Our Ukraine on the possibility of expanding the grand coalition.
In August, the parties signed a national unity agreement on key policy areas. But outstanding differences on some of its provisions prevented them from forming a common political platform in the Supreme Rada.
"Ten days is the maximum time within which members of the anti-crisis coalition can make up their minds," said Anatoliy Matviyenko, a member of the Our Ukraine parliamentary faction.
The pro-presidential bloc warned that otherwise it would move to the opposition.
"If this is not done, it will mean intentional retreat from the national unity agreement, and then we will have to switch to the opposition," Matviyenko said.
He said the six political forces comprising the bloc "are ready to search for a compromise, but we cannot violate fundamental positions on the pro-European choice, European integration, the EU, and the language policy."