Ukrainian opposition leader Mikheil Saakashvili says he will continue to rally people against the nation's authorities from abroad, following his deportation from the country.

Saakashvili was deported from Ukraine to Poland on Monday after being detained by armed, masked men at a restaurant in Kiev and rushed to the airport.

At a news conference in Warsaw Tuesday he described the deportation as having taken place by force and against international laws.

He vowed to continue rallying Ukrainians against the nation's authorities, saying they are corrupt. He said he will find a way to return to Ukraine, insisting it is his country.

Saakashvili was Georgia's president from 2004-13, and later was given a high position in Ukraine by then-ally President Petro Poroshenko. He has since criticized Poroshenko for failing to stem corruption.