A 26-year-old Syrian man has surrendered to authorities following a stabbing attack at a festival in Solingen, Germany, which resulted in three deaths and eight injuries. The attack occurred during the city's 650th anniversary celebration, with witnesses reporting that the assailant shouted 'Allahu Akbar.' The Islamic State has claimed responsibility for the incident, stating it was retaliation for actions against Muslims in Palestine. The suspect was apprehended in a refugee shelter, and his clothes were reportedly stained with blood at the time of his arrest. Two additional individuals, including a 15-year-old boy suspected of failing to report the planned attack, have also been arrested. The attack has raised concerns about security and the implications for upcoming state elections in Germany.