KNOXVILLE, Tenn. A gunman opened fire outside a hospital Monday, killing a woman and injuring two others before committing suicide, police said.

Knoxville Police Chief Sterling Owen IV said all the victims were female and current or former employees of Parkwest Medical Center. The attack happened about 4:30 p.m. outside the hospital's discharge area.

Police are still trying to determine a motive. A police spokesman said it did not appear that any of the victims were related to the suspect or that there was any connection between them. Spokesman Darrell DeBusk also said it did not appear the suspect was ever employed at the hospital.

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