According to Gwinnett County Police Department, four children and one man are dead after a stabbing at a home in Loganville, Ga.
Police also say that the children were under age 10.
"It's reasonable to believe they were in the home all night", Gwinnett County police cpl. No charges were immediately announced.
The children's mother was taken into custody, WGCL reported.
The woman - who recently moved with her family from IL to Georgia - was depressed about the death of her father, neighbors told the station, saying that they prayed about it recently in church, but said there was no indication she would harm herself or others.
"Right now, the indication is that the suspect used a knife, however, the medical examiner's office will be able to conclusively decide that later upon autopsy".
Police arrested the woman early Thursday at her Loganville home for what they dubbed a "horrendous crime". Officers who answered the call had arrived at the scene and found the five dead bodies. The neighbours said the Spanish-speaking family had moved to the community recently, and their children seemed happy playing with other neighbourhood kids.
"Everyone is in complete shock", Jim Hollandsworth, who runs the afterschool program, told the Journal Constitution.
A man at the scene identified himself as the killed father's brother.
Neighbors say the family was relatively new to the neighborhood.