Police officers secure the area near an Islamic center in Zurich, Switzerland, after three people were shot there on Monday, December 19. A gunman, decked out in dark clothing, opened fire on a group of worshipers standing inside a prayer room, police said, citing eyewitnesses. Ennio Leanza/Keystone/AP

Police officers hold a blanket near a body, but it was not known whether the discovery was related to the shootings. MICHAEL BUHOLZER/AFP/Getty Images

Police officers arrive on the scene. Ennio Leanza/Keystone/AP

Officers stand behind a police cordon outside the Muslim prayer hall. MICHAEL BUHOLZER/AFP/Getty Images

The suspect was found dead near the site of the attack, police said. Ennio Leanza/Keystone/AP

Police secure the area, which is near the city's central train station. Ennio Leanza/Keystone/AP