BUFFALO, Minn.—A 67-year-old man unhappy with the health care he’d received opened fire at a clinic Tuesday, killing one person and wounding four others, and bomb technicians were investigating a suspicious device left there and others at a motel where he was staying, authorities said. All five victims were rushed to the hospital, and a hospital spokeswoman confirmed the one death Tuesday night. Three remained in stable but critical condition and a fourth had been discharged. The attack happened Tuesday morning at an Allina clinic in Buffalo, a community of about 15,000 people roughly 40 miles northwest of Minneapolis. Authorities said Gregory Paul Ulrich, of Buffalo, opened fire at the facility and was arrested before noon. Though police said it was too early to tell if Ulrich had targeted a specific doctor, court records show he at one point had been ordered to have no contact with a man whose …