According to Capt. Bruce Fleshren, chief of investigations for sheriff’s department, deputies were dispatched to the 2600 block of Eastview Drive in Belleville just after 1 a.m.
The child, whose name has not been released, was brought the St. Elizabeth’s Hospital in Belleville before being airlifted to Cardinal Glennon Children’s Hospital. The two-year-old was pronounced dead at Cardinal Glennon.
Fleshren said the child's mother and her boyfriend were the ones who took the toddler to St. Elizabeth's.
The sheriff's department has requested help from the Illinois Attorney General’s Child Death Task Force on the case.
Authorities have identified a person of interest, but have not filed any charges as of yet. The investigation remains ongoing.
KPLR 11 News will have more information on this story as it becomes available.