Police in a quiet community outside Chicago who are investigating the shooting deaths of a family of four, including two children, in their home Sunday night say it wasn’t a random incident.

The two adults, their two children and their three dogs were found with gunshot wounds in their home in Romeoville, Illinois, about 30 miles southwest of Chicago, officials said.

Police do not consider the deaths a murder-suicide and are investigating the incident as a murder, Deputy Chief Chris Burne of the Romeoville Police Department, said during a news conference Monday.