Photos: Immigrants arrive at the Austrian border

As night falls, people break branches off of the trees to build fires for warmth. Thousands of people wait to get across the border into Austria from Slovenia where they were held up for days.

A young Syrian boy is crushed up against a border fence at the Austrian border. Thousands of people push to get across the border into Austria from Slovenia where they were held up for days. (Carolyn Cole/Los Angeles Times)

Thousands of people have been waiting from one to three days to get across the border into Austria from Slovenia where they were held up for days. Because they are in between the two countries, they are receiving no food or water and many are sick.

A young Syrian girl tries to get help for her mother who she was seperated from in the immigration line. Thousands of people push to get across the border into Austria from Slovenia where they were held up for days.

Afghan mother Jamileh Heydari breastfeeds her son, Matin, as she and her family of five try to enter Austria. They traveled from Afghanistan.

Omar Saman, of Iraq, holds his son Awyn, as he and his family wait to cross the border from Slovenia to Austria. Frustration is high as there is no food or water at this area between the two borders and no assistance for the thousands of families there.

Two Afghan men rest at the Slovenia side of the Austrian border where thousands of people are trying to across. Many have been held up for days in Slovenia without shelter.

A woman cries as she is told to go back after trying to get across the border ahead of the line. Thousands of people push to get across the border into Austria from Slovenia where they were held up for days.

Thousands of people wait to cross the border into Austria from Slovenia where they were held up for days. Austria border guards try to keep control of the situation.

Narges Heydari, 15, who travelled from Afghanistan catches her crying brother, Matin, 1, as he is lifted over the fence at the Austrian border. Narges climbed over the fence first because the crush of people was too much. She and her parents, and three other siblings arrived from Afghanistan.

A Syrian man holds his son’s hand through the fence as the father waits to get through to the Austrian side of the border. Small children were seperated from their parents as they waited in the crush of people.

An Austrian border guard tries to get people to back up and stop pushing as thousands of people try to get across the border into Austria from Slovenia where they were held up for days.

More than 3,000 immigrants wait to board buses at the Slovenia-Austria border for a six-hour bus ride to Germany.

Sardar Mohammed, 16, of Afghanistan, waits with other immigrants at the border of Austria and Germany on Oct. 29, 2015.

A Syrian immigrant family requests to stay in Austria, where they have one son living in Vienna.

Hiba, a 12-year-old Somali girl, waits with her family at the border of Austria and Germany on Oct. 29, 2015, after traveling for 21 days.