Sean Penn flees to Polish border on foot: Actor films documentary amid Ukraine-Russia crisis

Days after visiting the Ukrainian capital Kyiv to film scenes for his documentary on Russia's invasion, Hollywood actor-director Sean Penn found himself among thousands of refugees fleeing to Poland, joining the exodus on foot.

Penn, 61, posted a photo to his Twitter feed on Monday showing the movie star wearing a backpack and toting a piece of luggage on wheels as he trudged along the shoulder of a road beside a line of cars stretching into the distance.

"Myself & two colleagues walked miles to the Polish border after abandoning our car on the side of the road," Penn said in a caption tweeted with the picture. "Almost all the cars in this photo carry women & children only, most without any sign of luggage, and a car their only possession of value."

The tweet did not explain why the Academy Award-winning actor and his companions were forced to abandon their vehicle.