Relatives of the people killed and injured on the day known as "Bloody Sunday" marched in Northern Ireland to mark 50 years since one of the deadliest days in a violent conflict between Irish nationalists and British unionists over the status of Northern Ireland.

The conflict, also known as "The Troubles" lasted for around thirty years and primarily involved escalating tensions between groups who wanted Northern Ireland to break away from UK governance and unite Ireland as one nation and groups who wanted it to remain part of the UK. Religion also played a part in the clashes as the nationalists were predominantly Irish Catholic while the unionists were primarily Protestant.

The escalations began when civil rights demonstrations formed against the government, whom nationalists accused of police brutality and discrimination against the Irish Catholic minority.

On January 30, 1972, thirteen people were killed and 15 others injured when British soldiers opened fire on unarmed protesters in the city of Derry as they demonstrated against mass arrests and imprisonment without trial of people suspected of being nationalistic militants.

The day became known as "Bloody Sunday" and is often considered the bloodiest day of The Troubles. Ultimately, the conflict is reported to have killed more than 3,500 people including civilians before a ceasefire and an agreement restoring self-government to Northern Ireland in 1998.

Family members of the people killed during "Bloody Sunday" were joined by supporters as they marched through the streets with the names and photographs of the people killed.

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