India, Sept. 21 -- At least 30 people were arrested by the Dutch Police after a violent anti-immigration demonstration erupted in The Hague on Saturday.

According to local media reports, two policemen were injured during the clashes.

The Hague's mayor Jan van Zanen said the violent protest was triggered by 'hooligans'.

"And they used extreme violence," he said.

The police resorted to using tear gas and water cannon to disperse the anti-immigration protesters who targeted the cops with rocks and bottles..

How did the trouble begin?

The trouble began after a group of 1,500 protesters attempted to blockade the nearby A12 motorway, ignoring instructions by organisers.

Many of them were dressed in black, some covering their faces with b...