The Trilateral Contact Group in Minsk / Photo from  Dariia Olifer

"The document was signed by [OSCE Special Representative in Ukraine] Martin Sajdik, Leonid Kuchma and [Russia's representative] Azamat Kulmukhametov," she wrote on Facebook on Tuesday evening.

An initiative announced by Ukrainian President Petro Poroshenko in continuation of the Minsk accords of September 5, 2014 and February 12, 2015, has thus become reality, she wrote.

"The Trilateral Contact Group is waiting for this document to be signed by [leader of the self-proclaimed Donetsk People's Republic] Alexander Zakharchenko and [leader of the self-proclaimed Luhansk People's Republic] Igor Plotnitsky," she wrote.

In her words, Ukraine also demands that militant-held districts in Donetsk and Luhansk regions should immediately and strictly abide by these agreements as an integral part of the Minsk accords.