The St. Joseph Police Department is investigating the death of a child under the age of one.

Commander Eric Protzman said officers and paramedics responded Thursday around 1 p.m. to the 1500 block of Mason in reference to an unresponsive child.  The baby was transported to Mosaic Life Care and pronounced deceased.

Officers are investigating the death as required by state mandate. Protzman said anytime a child under the age of 17 dies police are required to conduct a death investigation as part of standard protocol .