OMAHA, Neb. -- New details are coming out in the case of three boys accused of sexually assaulting two girls in an Omaha foster home.

The girls are back with their parents and officers said the boys are out of the youth detention center and under electronic monitoring as of Tuesday night.

All three boys face multiple counts of first-degree sexual assault.

The details came out during public hearings in Douglas County juvenile court.

"It's very disturbing whenever you see children as both the perpetrator and the victims,” Douglas County Attorney Don Kleine said.

The alleged victims are sisters – a 4 and 6-year-old.

Prosecutors said they believe the assaults happened while the girls were living in a northeast Omaha foster home.

Court records state that sometime between February 2007 and July 2008, the suspects engaged in “inappropriate sexual contact, including penetration.”

"It's a situation you don't even want to imagine could happen,” Kleine said.

The suspects are aged 10, 11 and 11-years-old. One of them is the grandson of the woman who runs the foster home. Another is the brother of the two girls. The third boy is a neighbor.

Project Harmony helps interview child victims and directors said the deal with cases like these more than people might imagine.

Volunteers said that underage suspects are usually at least teenagers.

Services Director Colleen Roth said that incidents like these often stem from things the suspects have seen or experienced.

"These children who were abusing children, were likely abused themselves,” Roth said.

Court records state that the brother and sisters were moved into the foster home in 2007 because of abuse allegations against their parents.

One girl had a head injury requiring staples and one of the boys had neck injuries resulting from “excessive contact.”

The documents state the parents engaged in domestic violence in the presence of their children.

Prosecutors say, regardless of their age and circumstances, they believe the boys did break the law.

That said, prosecutors reminded KETV that there’s a difference between the way criminal actions are handled in juvenile court versus adult court.

If the boys are found the equivalent of guilty in juvenile court, they will likely be placed in rehabilitation programs as opposed to going to jail.

The foster care provider who is the grandmother of one of the boys is not charged.

Health and Human Services said her license is on hold pending the outcome of this case.

The girls were removed from her care in May, and she has not had any foster children in her home since August.