For a third night, riots rocked the town of Ballymena in Northern Ireland, with protesters throwing petrol bombs.

Public disorder broke out in Northern Ireland for the third successive night on Wednesday with videos and pictures on social media purportedly showing a fire in a leisure center in the town of Larne after masked youths smashed the building’s windows.

Anti-immigrant riots began in Ballymena, but economic grievances may not be enough to explain the phenomenon. Anti-immigration protests have escalated into clashes with police in several towns in Northern Ireland this week, marking a new wave of unrest to hit the United Kingdom.