A Sudanese man was arrested for attempted murder in Belfast after a graphic knife attack on a local man, which police are investigating as a critical incident without terrorism links.Prime Minister Keir Starmer condemned the violence while politicians clashed over whether the attacker's residency status signals broader failures in national immigration policy.Authorities have warned the public against sharing footage of the assault as they work to maintain community order.The Police Service of Northern Ireland confirmed that the assailant held a five-year visa and lived near the crime scene.