At least 29 people were detained including a suspected “terrorist” after some of the worst violence seen between police and migrants at Hungary’s now shut EU frontier.

The use of water cannon and teargas has been widely criticised by both Serbia’s prime minister who said it was “brutal” and “non-European” behaviour, while Montserrat Feixas Vihé of the UN’s refugee agency (UNHCR) said she was shocked:

“I’m extremely distressed because you know to see people who have been injured, to see children crying because they’re separated from their parents. People we know who have been separated from they’re families, who you know have been hurt. So it’s extremely distressing to us especially because we think that the degree of violence could have been avoided.”

Hungary’s decision this week to shut the EU’s external border with Serbia is the most forceful attempt yet by a European country to reduce the flood of refugees.

During the clashes as migrants tried to break the barriers scores