Thirty-four people have been arrested following "huge destruction by a riotous mob" in Dublin, Irish police have said.
Three young children were injured in a stabbing incident outside a primary school which sparked violent protests and clashes with police.
A five-year-old schoolgirl and a female teacher, believed to be in her 30s, remain in a very serious condition, police said.
"These are scenes that we have not seen in decades but what is clear is that people have been radicalised through social media and the internet," Garda Commissioner Drew Harris said.
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