Photos: Ukraine's million refugees' long trek to safety

A woman carries her child as they flee the city of Irpin, northwest of Kyiv.

Refugees fleeing the war from neighbouring Ukraine arrive at the border crossing in Palanca, Moldova.

A woman runs towards refugees after fleeing from the Ukraine and arriving at the border crossing in Medyka, Poland.

A Ukrainian serviceman helps evacuees gathered under a destroyed bridge, as they flee the city of Irpin, northwest of Kyiv.

A man helps a woman evacuee cross a destroyed bridge as she and others flee the city of Irpin.

Refugees crossing the rail tracks as they try to reach trains to Poland at the main train station in Lviv, Ukraine.

People sit on camp beds in a refugee reception center at the Ukrainian-Polish border crossing in Korczowa.

People walk at the border checkpoint in Medyka, Poland.

Ukrainian servicemen help a woman holding a baby as she crosses the Irpin river on an improvised path under a bridge that was destroyed by a Russian airstrike, while fleeing the town of Irpin, Ukraine.

A woman and a little girl react as she cannot immediately board a train departing to Poland at the main train station in Lviv, Ukraine.

People rest at a refugee shelter in Beregsurany, Hungary.

A mother holds her crying daughter after their arrival by train from Kharkiv at the main train station in Lviv, Ukraine.

People fleeing Russian invasion of Ukraine change trains at Euroterminal to be transferred to temporary accommodation centers around the country, in Slawkow, Poland.

People arrive at the border crossing in Velke Slemence, Slovakia.

People wait to board a bus at the border checkpoint in Medyka, Poland.

Refugees, mostly women with children, arrive at the border crossing in Medyka, Poland.

Volunteers talk to people who arrive at the border crossing in Velke Slemence, Slovakia.

People fleeing Ukraine gather at the border crossing in Palanca, Moldova.

Women holding their pet dogs as they wait outside the train station in Lviv, Ukraine.

Passengers, including people fleeing Russia's invasion of Ukraine, gather on a platform to board a train as they leave the city of Odessa, Ukraine.