Frustrations have boiled over on the Greek-Macedonian border as Europe struggles to handle the growing humanitarian crisis from the civil war in Syria.
Crowds tore down a barbed-wire fence on the Greek border, demanding to cross into Macedonia.
Migrants and refugees hurled stones at police, and Macedonian authorities responded by firing tear gas.
An estimated eight thousand people are gathered at Idomeni, the small frontier community on Greece's border with Macedonia.
Most are Syrians and Iraqis.
This Syrian man says people are desperate to find shelter.
"The situation is, as you see, like a disaster, and they don't open the borders, Macedonia don't open the borders, and people are coming more and more. So there's a very big number of people. You have to wait for a long time in the food and in toilets. Everywhere, you have to wait a long time. And if they don't solve this situation, it's going to get worse more and more."
Some people have been stuck on the Greek side of the border for more than a week with little food or shelter as Macedonia accepts just a small number of people each day.
Yesterday, Macedonian authorities let only 30 cross into their country.
This woman told Al Jazeera television she is angry at how the situation has been handled.
"Like everyone else, we ran towards the gate, people shouting, 'Open the borders.' I couldn't see further up, but then they fired tear gas. I fell with my kid while running away. This was wrong. We demand our rights. There's no need for violence. We have to be patient, and, slowly, slowly, everyone will get in."
Macedonia and some other Balkan countries have erected fences in an attempt to reduce the influx of migrants and refugees after more than a million reached Germany last year.
Many are fleeing war and poverty in the Middle East and North Africa, hoping to reach Germany.
More than 20-thousand are believed trapped in Greece, some sleeping rough in central Athens, some in an abandoned airport and at the 2004 Olympic Games venues.
Greece's migration minister says, without any outlet, that figure could rise as high as 70-thousand in the coming days.
Meanwhile, French police have fired tear gas to control migrants, refugees and activists who opposed the demolition of a camp in Calais known as The Jungle.
Violent clashes broke out as work got underway to clear part of the shantytown in northern France.
People threw stones, and three makeshift shelters were set ablaze as they protested against their eviction and the demolition.
Police have told them to move to a shipping container installed on another part of the site.
The Cabinet Director for the prefect of the Calais region, Etienne Desplanques, has blamed the activists for the unrest.
"You can notice right now that boarders don't hesitate to set fire to tents and shelters, to throw stones at riot police. It's not acceptable, and it's normal that we react so as to restore security."
A French court ruled last week it was legal to evict thousands of the residents from the camp and relocate them into temporary welcome centres.
The idea is, there, they can reconsider their plans and eventually apply for asylum in the country.
But the migrants and refugees in the camp are trying to reach Britain instead.
