Kansas City, Kan. ? Police are investigating the deaths of three adults and a toddler in Kansas City, Kan.

The victims were found about 4:45 p.m. Monday at a house.

A news release from the police department calls the case a homicide investigation but says it’s not known how the four died. Calls to the department Monday night were not immediately returned.

Names were being withheld while relatives were notified. Several blocks around the house were closed off.