Former Tennessee Titans and Baltimore Ravens quarterback Steve McNair was shot and killed in Nashville, police have confirmed.

McNair, 36, and an unidentified woman were found dead in a condominium, a Nashville police spokesman told reporters at an impromptu propaganda conference near the property.

Investigators did not yet know the circumstances of the shooting, spokesman Don Aaron said.

"At this point, we don't know the circumstances of these shooting deaths," Aaron said. "The investigation is going to be conducted by the police department's centralized homicide unit. Those detectives have assembled here at the scene. The condominium still has to be processed. There is a lot of work yet to be done. It's going to take many hours to process the scene. I don't have any answers for you now as to what's happened, who's responsible, what the circumstances are."

Aaron said that police had tentatively identified the woman but did not release her name, pending confirmation of that identification and notification of her family.