Austrian police said the protesters were repeatedly asked to remove face coverings and detained after they refused to comply.
The crash occurred on the N15 in Birchhill.
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Police were out in force as the march passed around three city blocks from the song contest venue.
Gardaí and emergency services responded to a call at a residence on Brookwood Heights, Artane shortly after 12.30am.
The incident has also been referred to Fiosrú, the garda ombudsman.
Martin was asked whether there was a “Wes Streeting waiting in the wings”.
Armoured vehicles, police horses, dogs, drones and helicopters will be deployed along with around 4,000 officers on duty.
Micheál Martin said the government has “a number of different mechanisms we can use to reduce pressures on families”.