Zakieya Avery and Monifa Sanford were arrested but told police the children were possessed and they were attempting to exorcise the demons.
1-year-old Norell Harris and 2-year-old Zyana Harris were stabbed to death and two other children were injured in the bizarre incident.
The Washington Post reports a neighbor saw a child alone in a car the night before. When he saw two women come out to of the house to get the toddler, he asked what was happening.
The women told him to mind his own business but being suspicious he called police.
When officers arrived no one answered the door of the Germantown, Maryland townhouse.
With no probable to enter the residence, cops left without making contact with the women.
But the next morning a bloody knife was found and police went inside to find the disturbing scene.
One of the women ran when officers entered but was caught a short time later.
Authorities say it’s likely the older two children were saved by the second 911 call.