There is one image that will haunt me after the infamous September 10 border crossing: a soldier from the Ukrainian border guard unit attacked from behind by one of former Georgian president Mikheil Saakashvili's supporters.
Amid conflicting reports of Saakashvili's whereabouts late Sunday, a spokesman for Ukraine's border guards said a crowd had broken through a frontier post with Poland at Shehyni in western Ukraine and started a fight.
Georgia on December 4 stripped former leader and reformer Mikheil Saakashvili of his citizenship as he had acquired a Ukrainian passport to serve as governor of the strategic Odessa region. Poroshenko stripped him of his Ukrainian citizenship. Saakashvili was outside the country when the decision was made. But while perhaps not a threat as a direct rival, Saakashvili could prove to be an effective weapon against Poroshenko for powerful opposition figures like Yulia Tymoshenko, who was with him at the border on Sunday.
An AFP reporter saw the one-time regional Ukraine governor and his supporters enter from Poland's Medyka border crossing, pushing aside Ukrainian border guards who had turned him back just hours earlier.
"It does not matter who violates the state border - invaders in the East or politicians in the West". "There are children here, there are ordinary Ukrainian citizens who want to get home".
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Saakashvili was allowed to pass through the Polish checkpoint at Medyka, before a line of border guards tried to block his approach to the Ukrainian side.
Some analysts say Mr Saakashvili is seeking to rouse supporters and eventually unseat Mr Poroshenko. The statement reads that the violators face from 5 to 8 years in prison.
He has brandished his Ukrainian passport on several occasions and also maintains that officials working for the UN High Commissioner for Refugees in Geneva have confirmed his status as "stateless in Ukraine", meaning he has the right to be there to appeal against Poroshenko's decision to withdraw his citizenship. I do believe that many in the presidential administration had simply hoped that Saakashvili wouldn't strike back. "We see what he did in his own country (Georgia) and that's enough for us".
Poroshenko condemned Saakashvili on Monday for crossing the border without proper documents and said law enforcement agencies should look into the incident.
"It looks like [Poroshenko] is getting rid of a political opponent". He is wanted in Georgia on charges related to his political career there, and Tbilisi has asked the Kyiv government to extradite him, but it is not clear whether the request will be honored.