A suicidal gunman has opened fire at a hospital campus in the US state of Nevada, killing one person, critically wounding two others and sending police on a door-to-door search within the facility amid the chaos.
The wounded victims were in surgery and one of them is a doctor, the Nevada Department of Public Safety said.
The gunman killed himself after the shooting on Tuesday, which Reno Deputy Police Chief Tom Robinson said doesn't appear to be random.
"I wouldn't say they were targeted, but I don't think it was just random," he told reporters outside the medical building on the campus of the Renown Regional Medical Centre.
Investigators said they were confident no one else was involved.
Robinson said he didn't know how many shots were fired or what type of weapon was used.
"I don't even know if there were multiple weapons at this time," he said.
All three victims and the gunman suffered some kind of gunshot wound and were in the same general area on the building's third floor, Robinson said.
Police didn't release their identities.
"As far as the suspect goes, we still don't have a solid identity yet but we are working several leads on who he is," Robinson said.
Department of Public Safety spokeswoman Gail Powell said the wounded doctor is a woman but she had no other information about the shooting at the Centre for Advanced Medicine, a modern structure connected by a second-floor walkway to the main hospital and a parking structure.
Robinson said there were about 100 people in the building when the shooting was reported. Officers entered three to five minutes later and did "a systematic search, floor to floor, room to room," Robinson said.
"On the third floor of the building they located two people down and located two people injured and evacuated the injured parties," he said.
Renown Regional Medical Centre posted a notice on its website less than two hours after the shooting saying operations had returned to normal at the main hospital but police were still investigating the shooting.
