Photo from UNIAN

"If a person crosses the border with an invalid document, such a document is to be withdrawn, and a person is denied crossing the border," Slobodyan told Ukrayinska Pravda, commenting on Saakashvili's intentions to return to Ukraine.

If the citizenship of Ukraine is terminated, the passport of the corresponding citizen of Ukraine loses force, he added.

Read alsoProsecutors say Saakashvili needs visa to cross into UkraineAs UNIAN reported earlier, Saakashvili announced the date of his return to Ukraine – that's September 10.

"Let's meet at the Krakovets border checkpoint [in Lviv region] on September 10," he said.

On July 26, President of Ukraine Petro Poroshenko, by his decree, stripped ex-president of Georgia, and former chairman of the Odesa Regional State Administration Mikheil Saakashvili of the Ukrainian citizenship he had been granted before taking up the Odesa post.

On August 7, ex-chairman of the Odesa regional administration Mikheil Saakashvili arrived in Poland from the United States holding a Ukrainian passport, as he stated on Facebook.