He added: "Whilst we make every effort to facilitate peaceful demonstrations, on this occasion the demonstrators did not inform police of their route and were unwilling to co-operate further with police today".
Other demonstrators said there was no political will to tackle issues around racism and inequality.
Later it emerged that Peter Morrison, a local photographer for Associated Press, had been treated for a serious head injury after getting caught up in the violence between demonstrators and the police outside.
As demonstrators take to the streets for civil rights in Birmingham, Alabama, a police officer deliberately sets a dog on an unarmed man.
Dozens of demonstrators made their way into the building on the north bank of the Thames in the run-up to event which was broadcast on Channel 4. Susan Philipsz won the £25,000 prize for her work Lowlands.
While more than 100,000 people turned out for rallies at the protests' peak this autumn, the numbers of demonstrators have sharply dwindled and public support for the movement has waned.
Since then the numbers of demonstrators picketing the clinic has dwindled.
The demonstrators likened Orbán to Russia's Vladimir Putin, and flew the EU flag, which Orban regularly denounces.
A French cultural centre was set ablaze in the southern town of Zinder, and one security officer and three demonstrators were killed in the melee, said interior minister Hassoumi Massaoudou.
Police then sought a rehearing, and the appeals court concluded its earlier opinion had wrongly required officers "to engage in an essentially speculative inquiry" into demonstrators' minds.
More than 5,000 demonstrators took to the streets of Muscat and Salalah in 2011, an impressive turnout for a country with a population of only 2.7 million.
