BRUSSELS, Sept. 18 - Russia has demanded changes to a free-trade deal between Ukraine and the European Union, underlining that Moscow was not satisfied by a last-minute concession from the EU to delay implementing the pact at the heart of the conflict in Ukraine, Reuters reported.

In a letter to the EU trade commissioner, seen by Reuters on Thursday, Economy Minister Alexei Ulyukayev said Moscow wanted three-way negotiations to amend the EU's treaty with Kiev, which Russia says will hurt its own economy.