Ukraine will be actively involved in the 5+2 negotiating format to restore Moldova's territorial integrity, Ukrainian President Petro Poroshenko said.

"Only decisive joint actions can help restore the territorial integrity of Moldova, and I would like to firmly note the position of Ukraine, which supports the position of doing everything for the territorial integrity, independence and state sovereignty of the Republic of Moldova to be indestructible. Ukraine will work actively and decisively, including in the 5+2 format," the president told journalists after talks with Moldovan Prime Minister Pavel Filip in Kyiv on Monday.

The 5+2 format involves Moldova and Transdniestria as the negotiating parties; Russia, Ukraine and the Organization for Security and Cooperation in Europe as mediators; and the U.S. and European Union as observers.

Despite Moldova having clearly declared its neutrality in its laws, Russian troops never left its territory, Poroshenko said.

"Today we agreed with Mr. Filip that only the return of Ukraine and Moldova into the European house can be a guarantee of peace, security and prosperity in our states," he said.

For his part, the Moldovan premier said the 5+2 format was discussed at the talks.

"We reaffirmed out position, that this conflict must be settled strictly in accordance with the principles of preserving the territorial integrity and independence of the Republic of Moldova. And in this context, I would like to express my gratitude to Ukraine for the support it gives Moldova in this process," he said.