Police in Savannah, Ga., were searching Sunday for a gunman who opened fire at a crowded fair, wounding seven people.

The shooting happened Saturday night at the Coastal Empire Fairgrounds  on Savannah's  suburban south side.

Savannah-Chatham metro police officers at the fair had just cleared up an apparently unrelated fight near the rides when shots were fired nearby at about 10:40 p.m., the Savannah Morning News reported. 

Nobody was killed but seven people were treated for gunshot wounds  at area hospitals, Savannah-Chatham County police spokesman Julian Miller said Sunday.

"The place was packed," Miller said, according to the AP. "It was Saturday night at the fair, and that's a big night."

Officers worked through the night to clear the scene and to search for a gunman reported to be wearing a dark jumpsuit.

The motive for the shootings was not known. Several people were detained and questioned Saturday night, but all had been released by investigators, according to AP.

More content from NBCNews.com:

• NTSB probes helicopter crash that klilled 2 Atlanta police officers
• Nanny charged in stabbing deaths of two children on New York's Upper West Side
• New player jumps into state elections to push education overhaul
• NYC crime falls by one third in wake of superstorm Sandy
• 'Couple more days' for fuel shortage, Bloomberg says; 'free gas' offer triggers rush
• Despite constant bloodshed, Mexico is ignored during White House race
• Video: Marathon runners racing to help out Sandy victims

Follow US news from NBCNews.com on Twitter and Facebook

MIAMI -- Three people were killed early Saturday when a driver racing two other cars crashed his vehicle into oncoming traffic, police say.

The accident occurred just before 2 a.m. on Flagler Street and 58th Avenue, according to authorities. Miami Police spokesman Willie Moreno said a Toyota Scion, racing westbound with two other vehicles, lost control and crashed head on with a family of four in a Ford Expedition.

"I knew what kind of car it was because I know about that," said onlooker Antonio Hernandez. "But it was, my impression was I have to stop to see that because I need to stop racing."

Also on NBCMiami.com: Police seek driver in deadly hit-and-run

The impact killed father Jose Serrano, 43, and his son, German Serrano, 15. The mother, 42-year-old Carmen Orta and the second child, 12-year-old Gabriel Serrano, remain in extremely critical condition at a hospital.

Also killed was 20-year-old Ivan Rodriquez Jr., the passenger in the Scion, who was ejected and pronounced dead on the scene.

Stay informed with the latest headlines; sign up for our newsletter

“You can see that the impact is so massive that it tossed this SUV, just tossed it around,” Moreno said. “The vehicle continued to rotate an additional three times before coming to a resting point. Also so massive the impact that the entire engine was dislodged from this vehicle.”

Police said that the Scion was traveling at an “excessive high rate of speed,” possibly 100 mph.

Watch US News crime videos on NBCNews.com

Moreno said authorities believe one of the other cars involved is a black Chevrolet Impala, but police are looking for accident footage from local businesses.

The driver of the Scion, identified as 19-year-old Alejandro Hernandez, who was also ejected from the vehicle, is in critical condition.

More content from NBCNews.com:

• Source: No deal yet on US-Iran nuclear talks
• Father dies shielding children from gunman who set home ablaze; boy killed
• Mystery ground shaking rattles South Jersey
• US nurse arrested in Macedonia awaits verdict in coin-smuggling trial
• Video: Texas school district tracks students with ID cards

Follow US news from NBCNews.com on Twitter and Facebook