The suspect behind a deadly knife attack at a festival in the western German city of Solingen in August bought the weapon at a local store only hours before the stabbings. Sources told dpa the interior minister for the state of North Rhine Westphalia (NRW), which includes Solingen, provided that detail during a closed-door briefing to state lawmakers. The attack in the city of Solingen, which left three dead and several more wounded, shocked the country. The suspect, a 26-year-old Syrian man, was captured the next day after a massive manhunt. According to sources, NRW Interior Minister Herbert…