WALTHAM, MASS. (WHDH) - Authorities are investigating the death of a 5-month-old baby who was found unresponsive at a licensed daycare facility in Waltham on Tuesday night, officials said.

Emergency officials responding to the daycare on Falmouth Road rushed the baby to the hospital after staffers administered CPR, according to Middlesex District Attorney Marian T. Ryan.

The baby was later pronounced dead at the hospital. A cause of death has not yet been determined.

Christina Grassetti who lives next door to the daycare said she saw emergency responders giving CPR to the infant.

“It was very upsetting to see,” Grassetti said. “I was really hoping for the best and now that I have heard that it didn’t turn out that way, I am very upset that that is how that ended up.”

In wake of the baby’s death, Ryan says detectives assigned to her office will now provide families who suffer the unexpected death of a child with informational material from The Massachusetts Center for Unexpected Infant and Child Death.

“The loss of a child is the most devastating tragedy a family can endure. We know that the trauma of this loss has immediate impacts on those who loved and cared for that child,” Ryan said in a press release.

Waltham police and state troopers assigned to Ryan’s office are investigating.

This is a breaking news story; stay with 7NEWS for updates online and on-air.

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