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Loyalists celebrate the Twelfth of July in Belfast, Northern Ireland

Stephen Wilson / AFP - Getty Images

Children play around a bonfire lit in the shadow of the a shipyard to celebrate the start of the loyalist Twelfth of July Celebrations in Belfast, Northern Ireland on July 11. Bonfires are traditionally lit in protestant areas on July 11 to mark the start of the Twelfth Celebrations. Later in the evening, other Nationalist areas saw intence rioting and petrol bombing of police.

Read more about the riots here.

More than 20 police officers were hurt in clashes with July 12 revelers in Northern Ireland. TODAY.com's Dara Brown reports.