Mounties in Williams Lake, B.C., say two people were arrested after a 32-year-old man brought a dead infant to a hospital.
Police say a second injured child was later found and brought to the hospital for a medical assessment.
They say the man and a 33-year-old woman were arrested, but did not specify their relationship to the children.
The pair has since been released.
The RCMP say the Ministry of Children and Family Development has been informed and has launched an investigation.
The Mounties say the incident seems to be isolated and there is no risk to the public but are asking anyone with information to contact police.