Polish Foreign Minister Radoslaw Sikorski cut short a visit to Iran on Saturday to handle the deepening crisis in Crimea after pro-Russian gunmen seized the government and parliament buildings.

"I have to shorten my visit to Iran due to the developments in Crimea and return to Poland," Sikorski told a joint news conference with his Iranian counterpart Mohammad Javad Zarif.

"The situation is getting more critical in Crimea."

Sikorski arrived in Iran on Friday for what had been scheduled as a four-day visit, including a meeting with Iranian President Hassan Rouhani.

As he spoke, the Polish foreign ministry put out a statement in Warsaw calling for an end to "provocative" troop movements in Crimea, a majority-Russian Ukrainian territory.

"We are the only country that has a consulate operating in Crimea and unfortunately they confirmed that Russian forces are present," Sikorski said.

"We have been closely following the developments there," he added.