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Frustrated refugees finally lost their patience and demanded to be allowed to cross Serbia's border into Hungary.

They have been stuck on the Serbian side of the crossing since Hungary finished erecting its razor wire fences. 

Several hundred refugees stormed the fences this afternoon, throwing rocks and bottles at Hungarian police.

Riot officers responded by firing tear gas and water cannon, sparking a stampede among panicked refugees. 

Tonight many were seen breaking through the barricade while outnumbered riot police sheltered behind shieldsHungary's heavy-handed approach has been condemned by the UN Secretary-General and human rights groups

Refugees walk towards a transit camp in Gevgelija, Macedonia, after entering the country by crossing the border with Greece today.

Refugees wait to enter a transit camp in Gevgelija, Macedonia, after entering the country by crossing the border with Greece this morning.

Austrian border police check cars on the highway A4 at the border between Hungary and the border town of Nickelsdorf.

Members of the Red Cross distribute free food to refugees at the border crossing point in Nickelsdorf, Austria.

A family from Syria arrive the border between Serbia and Croatia.   The first groups of migrants have started arriving in the country.

Migrants enter a police vehicle to bring them to a registration center after they crossed the border between Serbia and Croatia.

Refugees wait to enter a transit camp in Gevgelija, Macedonia, after entering the country by crossing the border with Greece this morning.

Refugees walk along the platform at a train station in the south German border town of Passau after being removed from the train by police.

A refugee woman carries a little girl after being removed from a train by police at a train station in the south German border town of Passau.

Refugees walk through countryside on the Serbian side of the border with Croatia this morning. The area is littered with landmines.

Around 200 frustrated refugees blocked on the Serbian side of the border threw plastic water bottles at rows of helmeted riot police and chanted demands that the border be re-opened.

Refugees sleep on a highway in front of a barrier at the border with Hungary near the village of Horgos in northern Serbia this morning.

This morning refugees stuck at the border finally lost their patience, storming the gates as police threatened to tear gas them.

As desperate men, women and children pleaded to be allowed through the newly completed razor wire fences (pictured), several hundred finally lost their patience and attempted to break through the barricades.

Numerous ambulances arrived as police and military helicopters hovered overhead. Refugees poured water over their eyes and mouths after escaping the tear gas. Others put damp cloths over their noses and went back for more.

As Hungary finished erecting the final stretch of razor wire fence sealing its border with Serbia (pictured), desperate refugees have immediately started looking for alternative ways to reach western Europe.

Police responded to the refugees storming the fence by firing tear gas and charging at the crowds.

The heavy-handed reaction triggered a stampede among the refugees, as thousands of women and children panicked at the sight of armed riot officers wearing helmets and gas masks.

Hungarian police responded by firing their tear gas and water cannon across the border into Serbia and charging through the gates in an attempt to disperse the crowds.

As desperate men, women and children pleaded to be allowed through the newly completed razor wire fences, several hundred finally lost their patience and attempted to break through the barricades.

Around 200 frustrated refugees blocked on the Serbian side of the border threw plastic water bottlers at rows of helmeted riot police and chanted demands that the border be re-opened.

Even those wanting to avoid the landmine-packed Croatia-Hungary border are now likely to see the country as the best route into the hallowed Schengen Area - the European countries that have removed passport controls and allow people to pass in and out of member states without restriction.

As scuffles broke out on the Hungary-Serbia border and riot police were deployed (pictured), hundreds of desperate migrants began looking for alternative ways to reach western Europe.

A woman is carried away on a stretcher following clashes between refugees and Hungarian riot police on the Serbian border.

A refugee makes the peace sign as Hungarian riot officers use water cannon to push back refugees at the Hungarian border with Serbia.

One man was knocked onto the ground flat onto his back and was taken away in an ambulance. Others pulled their T-shirts over their faces, eyes streaming as a result of the tear gas.

A protester waves a crutch at the Hungarian riot police preventing the migrants from crossing into Hungary.

A migrant appears to throw a large pole at the border crossing during the protests yesterday which left many wounded.

Hungarian riot police form a impenetrable unit with their shields while a water cannon blasts refugees.

Scene of the violence: Skirmishes broke out at the border crossing between Horgos on the Serbian side and Roszke in Hungary (pictured).

Some protesters simply put damp cloths over their faces to limit the impact of the tear gas and went back to continue the protests.

Refugees on the Serbian side protest as Hungarian riot police fire tear gas and water cannon at them yesterday afternoon.

Hungarian police responded by firing their tear gas and water cannon across the border into Serbia.

The reaction triggered a stampede among the refugees, as thousands of soaked men, women and children panicked.

An injured Hungarian riot policeman is taken on a stretcher to a waiting ambulance after protests at the border turned nasty yesterday.

As desperate men, women and children pleaded to be allowed through the newly completed razor wire fences, several hundred finally lost their patience and attempted to break through the barricades.

A migrant with a cut to his head is pictured in the middle of the road as riot police form a barricade in the background.

Syrian migrants are pictured at the Hungarian border. One young girl suffered a head wound, which was covered with bandages.

Migrants were pictured fleeing Hungarian riot police after tear gas and water cannon were fired in an attempt to disperse the protesters.

As darkness began to fall following clashes with Hungarian police, an injured migrant was pictured searching for his belongings.

A young boy is pictured crying after tear gas was fired into the crowd of migrants following clashes with riot police on the Hungary border.

Violence erupted at the border between Hungary and Serbia, with protesters demonstrating against Hungarian riot police's refusal to let them into the country.

One migrant can be seen scaling border fencing during clashes between riot police and thousands of migrants yesterday.

Hundreds of migrants smashed their way past police and into Hungary after chaos at the country's border saw thousands of rock-throwing migrants pitted against riot police armed with tear gas and water cannon.

Riot police hold a migrant at the border crossing with Serbia in Roszke, Hungary (left), while, right, a refugee throws a stone towards Hungarian riot police after they used water cannon and pepper spray at the Hungarian border.

Refugees poured water over their eyes and mouths after escaping the tear gas (pictured). Others simply put damp cloths over their faces and went back to continue the protests.

Last night the crowd were seen pouring through the border crossing while Hungarian police reinforcements sheltered behind their riot gear. Two Hungarian policemen can be seen escorting a migrant woman with her child in Roszke, Hungary.

Migrants are pictured breaking open a fence during clashes with Hungarian riot police at the border crossing with Roszke.