WARSAW — Ukrainian opposition leader Mikheil Saakashvili said Tuesday that he would continue rallying people against the nation’s authorities from abroad, following his deportation.

At a news conference in Warsaw, Saakashvili described his detention in Kiev by armed, masked men and immediate ejection to neighboring Poland as a violation of international laws.

He vowed to continue encouraging Ukrainians to stand up to authorities he considers ‘‘corrupt elites.’’

‘‘We will have millions of people protesting in the streets of Ukraine,’’ Saakashvili said.

Saakashvili was deported to Poland because he entered Ukraine from there last year. Speaking in Ukrainian and English, he said he would find a way to return to Ukraine, insisting it is his country.

Saakashvili and a small crowd of supporters shoved their way through a line of guards from Poland into Ukraine in September.

‘‘Warsaw-Kiev, Kiev-Warsaw, I have traveled that route many times and will do it again,’’ Saakashvili said, without offering specifics.

ASSOCIATED PRESS