After Hungarian police used water cannons and tear gas on hundreds of migrants Wednesday in a bid to force them back from its border with Serbia, charities and action groups are becoming increasingly concerned that Europe's authorities are losing control of refugee crisis.
Coverage of the violent scenes in Hungary showed tear gas being used against crowds of migrants, among whom were children and babies. The police said they had detained 29 people including a "terrorist" amid the clashes.
The Secretary General of the United Nations (UN) Ban Ki-moon said he was "shocked" by the actions by Hungarian police on Wednesday.
"I was shocked to see how these refugees and migrants were treated. It's not acceptable ... since they are the people who are fleeing the violence and persecution, we must ensure our compassionate leadership," he told reporters at a UN press conference Wednesday.