A hospital treating four people wounded by an ax-and-knife-wielding man who attacked people on a German train last week says two of the victims remain in intensive case. Wuerzburg's university hospital said in a statement Monday that "the state of health of all patients has stabilized but the risk of complications remains substantial." Officials say the man who blew himself up near a music festival in the Bavarian town of Ansbach, wounding 12 others, was known to police for low-level drug offenses. An emergency response coordinator says paramedics working at a music festival in Ansbach were quick to react to the blast that killed the attacker and wounded 12 people in the Bavarian town late Sunday. Bavaria police said in a statement Monday morning that security staff noticed the man with the backpack near the entrance of the concert site in Ansbach, where some 2,500 people were listening to music bands on Sunday night around 9:45 p.m. According to witness accounts he briefly leaned forward at 10:10 p.m.