Poroshenko and Kaljulaid / Photo from UNIAN

Estonian President Kersti Kaljulaid will be the first leader of a foreign state to visit the Ukrainian-controlled Donbas area, which was liberated by the Ukrainian army from the Russian occupation forces.

"The President of Estonia will be the first head of a foreign state that will visit the part of Donbas liberated from Russian invaders," Ukrainian presidential press secretary Svyatoslav Tsegolko said on Twitter on Tuesday.

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Kaljulaid arrived in Kyiv on May 22. She has already met with Ukrainian President Petro Poroshenko.

She is also due to meet with Ukrainian Prime Minister Volodymyr Groysman, Deputy Prime Minister Ivanna Klympush-Tsintsadze, and Speaker of Ukraine's Parliament Andriy Parubiy on Tuesday.

According to Estonia's Eesti Rahvusringhääling, Kaljulaid is on an official visit to Ukraine on May 22-24.

"For security reasons the precise locations she will be visiting in eastern Ukraine have not been disclosed," it said.

The Estonian president is accompanied by a delegation including Estonian MPs Eerik-Niiles Kross and Johannes Kert, and Secretary General of the Ministry of Defense Jonatan Vseviov.

The Estonian president will also give the closing speech at the Estonian-sponsored "Women in Business" event, as well as will be opening the Estonian-Ukrainian business workshop. She is to meet with Head of the National Anti-corruption Bureau of Ukraine Artem Sytnyk, and other Ukrainian officials, politicians and businessmen.