The revocation of Saakashvili's citizenship was met with criticism by some Ukrainian politicians with ex-Prime Minister and Batkivshchina (Fatherland) Party leader Yulia Tymoshenko believing that this move was another step toward dictatorship in Ukraine.
"For that I intend to travel around all the regions of Ukraine, to unite as much as possible with people and with different political forces around a shared theme - that we should have democracy and not the diktat of oligarchs". "We need to overcome the oligarchy". Poroshenko stripped him of his Ukrainian citizenship. "I hope that this gentleman will have the same zeal to make his way to Georgia, as he tried to get to Ukraine", Poroshenko said.
The failure to stop Mr Saakashvili from returning was an embarrassment for Kiev and another headache for a leader fighting a Russian-backed insurgency and trying to restart a struggling economy. "Instead of this, a crime has been committed, because there is a constitutional principle of inviolability of borders", Poroshenko said. "There should be precise, legal, judicial responsibility".
Speaking to reporters in Rzeszow, the 49-year-old Saakashvili said that Poroshenko's actions, "the way how he mobilized the whole of the state apparatus" against him, "means that he feels some existential threat" from the former Georgian president.
He left in disgrace for Ukraine in 2015 to work for the country's pro-Western authorities as governor of the key Odessa region on the Black Sea.
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Before crossing the border, Saakashvili has explained stis difficulty by the fact that Kiev "panic", saying that he wanted "not to overthrow the president Porochenko" goal just to defend sti rights. Saakashvili says the decision was politically motivated.
Supporters who had gathered on the Ukrainian side rushed forward to greet Saakashvili and the crowd proceeded toward the Ukrainian town of Shehyni on foot. According to the State Border Guard Service, 12 National Police fighters and 10 border guards have sustained bodily harm.
"I was tremendously impressed", he said.
But a crowd of supporters, who chanted "Misha, Misha" - a diminutive of his name - forced their way into Ukraine with Saakashvili, who now risks extradition to his native Georgia. He eventually got off the train and took a bus to Medyka, where he successfully crossed the border. Government officials at the border said 17 police and guards were injured during the confrontation with Saakashvili's supporters.