'The main issue of the negotiations will be the security policy in a context of the conflict on the East of Ukraine', the message said.
Duda will arrive in Kharkiv, where the meeting with Petro Poroshenko is planned.
'The President of the Republic of Poland will meet Petro Poroshenko, the President of Ukraine, the observers of the OSCE SMM and the representatives of the UN Development Programme. He will honor the memory of the Polish soldiers murdered by the NKVD and buried at the Memorial of Totalitarianism Victims in Kharkiv', the message said.
Earlier it was reported that the Polish president intends to pay an official visit to Ukraine.