An investigation is underway into the death of a 3-month-old baby boy in Brownsville Friday.

Police say the baby was sleeping in the same bed as his 21-year-old mother, but failed to wake up the next morning. The infant was taken to Brookdale Hospital, where he was pronounced dead. Relatives say his mother was very protective of her son and made people wash their hands before touching him. Police say they do not suspect foul play.

An autopsy will be preformed on the 3-month-old to determine the cause of death.