A sign rests atop four cars Saturday in a downtown Atlanta parking lot after a tornado touched down Friday evening. Crews hauled broken glass and furniture out of downtown streets Saturday and homeowners surveyed damage caused by a tornado that caught residents and visiting basketball fans by surprise.

Atlanta ? Tens of thousands of basketball fans at two arenas were perfectly safe, officials insisted Saturday, even though the crowds apparently weren’t warned about an approaching tornado – one that would ravage skyscrapers and injure dozens.

About 18,000 people were watching the Southeastern Conference men’s tournament Friday night at the Georgia Dome when its fabric roof began rippling, the catwalks above the court started swaying and chunks of insulation rained onto the players.

The National Weather Service issued a tornado warning about eight minutes before the twister hit, but it wasn’t clear when or if that alert was passed on to fans, said Katy Pando, a dome spokeswoman. Fans claimed they never heard or saw one.

Another 16,000 fans watching an NBA game at Philips Arena, in the same complex as the dome, weren’t told of the weather, either. The arena apparently sustained little damage, Atlanta Hawks spokesman Arthur Triche said.

The tornado, with winds up to 130 mph, cut a 6-mile path through downtown Atlanta, smashing hundreds of windows in and around the CNN Center, blowing furniture and luggage out of hotel rooms and crumbling part of an apartment building. At least 27 people were hurt, though no injuries were believed to be life-threatening, and no injuries were reported at the arenas.

“I thought it was a tornado or a terrorist attack,” said Mississippi State guard Ben Hansbrough, whose team beat Alabama 69-67 after an hourlong delay under a roof with at least two visible tears.

“Ironically, the guy behind me got a phone call saying there was a tornado warning,” fan Lisa Lynn said. “And in two seconds, we heard the noise and things started to shake. It was creepy.”

Elsewhere in Georgia on Saturday, storms killed one person in Polk County and another in Floyd County, both near the Alabama line, emergency management officials said. Storms in South Carolina and Alabama left thousands without electricity.

Crews hauled broken glass and furniture out of streets in downtown Atlanta, where all events scheduled for Saturday were canceled, including the St. Patrick’s Day parade.

Local and state officials were reluctant to weigh in on whether public venues and businesses are responsible for alerting patrons of imminent weather danger. Georgia Insurance and Safety Fire Commissioner John Oxendine said his office would look into whether people at the Georgia Dome got a timely tornado warning, though he considered the question premature.

“There wasn’t much time to tell anybody anything” before the storm hit, said Catherine Woodling, a spokeswoman for Mayor Shirley Franklin.

A warning from the weather service gave residents in nearby neighborhoods about eight minutes to seek cover. Guests at the Omni Hotel were quickly ushered into hallways, away from glass and flying furniture, and the only injuries were “some cuts and scrapes and no major issues as far as we know,” hotel spokesman Mike Sullivan said.