Authorities are still awaiting the official cause of death of a preschooler who went down for a nap on Good Friday in a St. Louis public school classroom and never woke up.DeMai Hatcher, 4, was found unresponsive by her grandmother on her nap mat inside the Monroe School preschool classroom on April 10 around 3:15 p.m. The grandmother, a librarian at the school, had arrived to take the child home as she did every afternoon, said District Spokesman Patrick Wallace.

An autopsy performed by the St. Louis City Medical Examiner Office did not reveal an immediate cause of death, and officials are awaiting the results of other lab work, said Rose Psara, chief investigator with the office.

District officials said they were unaware of any past or ongoing medical problems with the child, but Psara said the child did have asthma.

According to a teacher and an aide in the classroom, DeMai had gone down for a nap after lunch time along with 10 other children in the class. She woke briefly around 2 p.m., told her teachers she was still sleepy and fell back to sleep, Wallace said.

Wallace said the two teachers were in the class during the nap period. They assumed nothing was amiss because the child routinely slept to dismissal time when she was awakened by her grandmother, he said.

“This was not an abnormal reaction or behavior by this child,” Wallace said. “She would oftentimes sleep after the normal nap hours.”

At the time of the discovery, Wallace said there were still two children awaiting pick-up, but he was unsure if they were in the classroom. The district notified the families of the other children in the class about the death via phone calls over the weekend, and a grief counselor was on hand the Monday following the death. The child’s grandmother has not returned to work, he said.  The teachers were back to work on Monday after the incident.