On Wednesday, in Hopewell, Virginia, seven children, all under 8 years old, overdosed on sleeping pills and were rushed to the hospital after being found unresponsive.

According to WTVR, an investigation is underway as authorities question if the children were left unattended or if they were supervised as it was reported.

Three children were dropped off at the 100 South 16th Street residence, the home of the mother of the other four who overdosed. The second mother was responsible for babysitting all seven kids. Shortly after 5 p.m, Hopewell Police arrived at the home to find four children — ages 1, 2, 3, and 4, in critical condition.

In another part of the apartment, three other children were found awake but were still in need of immediate medical attention.

The woman who lived at the residence was responsible for supervising all of the children left to go to a corner store. She told authorities that she left the children with another adult in the house and expressed she would be back but did not communicate clearly that the children needed to be watched after.

“She claimed there was another adult in the house who was supposed to be watching them,” Lt. Cheyenne Casale said to WTVR.

Investigators believe that a 7-year-old child gave the children his sleeping pills.