LONDON — Six people were arrested after a crowd outside a hotel housing migrants near Dublin threw bricks, bottles and fireworks at officers and burned a police van, Ireland’s national police force said Wednesday.

One police officer was treated for a foot injury, said the force, the Garda Siochana.

Hundreds of people, many waving Irish tricolor flags, gathered outside the CityWest Hotel in Saggart, on the fringes of Dublin, on Tuesday evening after reports of a sexual assault in the area.

Some attacked police who stood between them and the hotel, with attempts to charge the police line with horse-drawn carts. Police used pepper spray as they tried to disperse the crowd.

Police Commissioner Justin Kelly condemned what he called “thuggery” by “a mob intent on violence.” Prime Minister Mi

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