Police provide details of the route into the UK taken by the suspect in a Belfast knife attack case. According to reporting, the suspect is a Sudanese national who entered Northern Ireland in 2023 after claiming asylum. The accounts describe that he crosses the Irish border, where he makes the asylum claim, and later is granted leave to remain in Northern Ireland. The information is presented by police as part of an effort to clarify how the suspect arrived in the UK ahead of the attack. The published reports focus on the sequence of events tied to the asylum process and subsequent immigration status, rather than on wider circumstances of the incident itself. Across the sources, there is consistency that the key point in the timeline is the 2023 border crossing, the asylum claim in Northern Ireland, and the later decision granting leave to remain. No additional, contradicting details are provided in the supplied excerpts.