Two children were picked up by police on Sunday after a caller reported seeing them walking unattended in their neighborhood. The parents of the children have previously been investigated for letting them walk home alone.

Danielle and Alexander Meitiv of Silver Spring, Md. practice what they call a “free range” parenting style, which she described on her website as having “kids who roam.”

Dvora, 6, and Rafi, 10, were walking home from a local park when someone observed that they were alone and called the police. The children were placed into the custody of Child Protective Services for a few hours and were returned to their parents after they signed a “safety plan” which states that they will not leave their children unsupervised.

According to Today.com, the children were “two blocks away from their house.”

Meitiv wrote on Facebook:

THE KIDS ARE HOME! CPS finally let us see them at 10:30 and after making us sign a “safety plan” let us bring them home.

Posted by Danielle Meitiv on Sunday, April 12, 2015

The police coerced our children into the back of a patrol car, telling them they would drive them home. They kept the…

“Unfortunately, our first thought was, CPS and police. I never thought they were abducted by a stranger,” Danielle Meitiv told Today.com. “Our first fear was, ‘Holy cow. Could the police have stopped them?’ I actually had a nightmare about this a month ago, but I didn’t think it would actually happen.”

Jordan Richardson, a visiting legal fellow at The Heritage Foundation, said that this case raises “two important questions:”

“First, is walking home from school unattended dangerous? Second, should the government intervene if the parents allow this behavior? While there can be reasonable debate about the first question, we should be cautious about how we apply a policy solution to the second. When the government treats ordinary behavior as criminal activity, it undermines the legitimacy of the justice system.”

CPS did confirm to NBC-Washington that the Meitivs are under investigation.

The Meitivs have said that they are seeking legal counsel, but will not violate the terms of the safety plan.

We have contacted our attorney Matthew Dowd of Wiley Rein & will issue a statement soon about our position and next steps. Until then we aren’t doing anymore media interviews. Thanks for your understanding.

Posted by Danielle Meitiv on Monday, April 13, 2015