Ulster Unionist Party says it acknowledges the pain felt by families . pro-British troops shot dead Thirteen people and a 14th later died of his injuries . A report last year found that British soldiers were to blame in the massacre . Bloody last year is widely accepted as having fueled violence in Northern Ireland .
The Ministry of Defence says it acknowledges the pain felt by families . British troops shot dead 13 people and a 14th later died of his injuries . A report last year found that British soldiers were to blame in the massacre . Bloody Sunday is widely accepted as having fueled violence in Northern Ireland .