NASHVILLE, Tenn. -- Former NFL quarterback Steve McNair and a woman were found shot to death Saturday inside a residence in Nashville, police said.

Nashville police spokesman Don Aaron confirmed that authorities were called to a condominium and found McNair and a woman shot to death inside. Aaron said police don't yet know the circumstances of the shootings.

"I don't have any answers for you now as to what's happened, who's responsible," Aaron said.

Aaron said police tentatively have identified the woman but did not release her name.

"There are persons who were around the complex today, visitors, who have been taken to headquarters for questioning, just to see what they know, what they may have seen," Aaron said. "No one is in custody right now."

The condominium where the bodies were found is one that McNair was known to frequent, but police spokeswoman Kristin Mumford could not say whether he was the owner.

Detectives from the police department's centralized homicide unit were on the scene.

McNair played 13 seasons in the NFL and led the Titans within a yard of forcing overtime in the 2000 Super Bowl, which they lost 23-16 to the St. Louis Rams. He also played for the Baltimore Ravens before retiring in April 2008.

"We don't know the details, but it is a terrible tragedy and our hearts go out to the families involved," NFL commissioner Roger Goodell said in a statement.

"We are saddened and shocked to hear the news of Steve McNair's passing today," Titans owner Bud Adams said in a statement. "He was one of the finest players to play for our organization and one of the most beloved players by our fans. He played with unquestioned heart and leadership and led us to places that we had never reached, including our only Super Bowl."

About 50 people crowded just beyond police tape outside the complex in the upscale Rutledge Hill neighborhood, some wearing Titans hats. The condominium is located within walking distance of an area filled with restaurants and nightspots, just a few blocks from the Cumberland River and within view of the Titans' stadium.

McNair began his career in 1995 with the Houston Oilers, who eventually became the Titans, and finished with 31,304 yards passing and 174 touchdowns. McNair played with pain for several years, and the injuries ultimately forced him to retire.