MARYLAND HEIGHTS, Mo. - Ambulances were dispatched to an area near Westport Plaza in Maryland Heights after multiple people were stabbed Thursday night.
The incident occurred just after 8:20 p.m. in the 12000 block of Marine Avenue.
One adult man and one child under the age of 5 were killed. One adult woman and a child under the age of 5 were rushed to a local hospital with serious injuries.
Investigators described the incident as a domestic situation involving a single family.
Police said the suspect, who is related to the victims, remains at large.
Note: An earlier version of this story identified the location as being near Creve Coeur Lake. It has since been corrected.