LOGANVILLE, Ga. -- Four young children and their father were found slain in a home outside Atlanta early Thursday, and police said the mother -- now charged with their deaths -- called 911 to report the killings.

The five apparently were stabbed to death. A fifth child, a girl, survived and was hospitalized with injuries described as serious, police said.

The woman was detained by police after the bodies were found inside the home in Loganville, Gwinnett County, Georgia, police Cpl. Michele Pihera told reporters at the scene. Police later charged 33-year-old Isabel Martinez with five counts of malice murder, five counts of murder and six counts of aggravated assault.

"She was quickly taken into custody, and right now, she's at Gwinnett County Police Headquarters, being interviewed," Pihera said.

Police have not said whether she was injured and said a motive wasn't known.

Early indications are a knife was used to attack the five, though a medical examiner will make the final determination about the cause of death, Pihera said.