Ukraine's President Petro Poroshenko has signed a decree dissolving the country's parliament and called for snap elections in October, Press TV reported.
Poroshenko made the announcement on Monday via a statement posted on his website, saying that the date for the upcoming vote is set for October 26.
"I have decided to prematurely end the authority of parliament," he wrote.
The president said that his actions were consistent with Ukraine's constitution, and that Kiev's ruling coalition had collapsed several weeks ago.
Poroshenko is set to meet his Russian counterpart Vladimir Putin at talks in Belarus capital, Minsk, on Tuesday.
Earlier on Monday, Poroshenko expressed extreme concern over what he calls "the breach" of his country's borders by Russian armored vehicles, and also Moscow's intention of sending a second convoy of humanitarian aid to his country.
Ukraine's eastern regions have witnessed deadly clashes between pro-Russia protesters and the Ukrainian army since Kiev launched military operations there in mid-April.
The political unrest in eastern Ukraine has so far claimed the lives of more than 2,000 people, according to figures released by the Office of the UN High Commissioner for Human Rights (OHCHR).
Nearly 300,000 people have also been forced to flee their homes due to fierce fighting in the east, according to the UN.