Documents containing sensitive security information related to President Joe Biden's visit to Belfast were lost ahead of his speech on Wednesday. A resident is believed to have found the documents on a street in Belfast. While the documents included names of Belfast police and postings, they did not have any information related to the Secret Service's operations or its security plans for the president's visit. The breach in security occurred as the terrorism threat level in Northern Ireland had been raised to "severe" prior to Biden's visit, which marked the 25th anniversary of the Good Friday Agreement that ended a 30-year-long civil war in Northern Ireland. The area around Belfast's city center was barricaded off to protect the president. Despite the mishap, a Secret Service official confirmed continued trust in local authorities and downplayed the significance of the information contained in the police documents. The Secret Service has, over recent months, faced several security challenges during Biden's administration, including navigating the president's surprise visit to Ukraine earlier this year, ahead of the anniversary of Russia's invasion.