A woman and a man have been found dead at a property in Queensland's south-west, in what police suspect is a murder-suicide.The 23-year-old woman and 45-year-old-man were found at a property on King Street in Charleville this morning.Emergency services were called to the property after reports of a serious assault at 6pm yesterday.An emergency declaration was issued shortly after and revoked about eight hours later.The Queensland Ambulance Service said a toddler was taken to Charleville Hospital in a stable condition with a minor leg laceration about 6pm.No members of the public or police officers were injured during the incident.Murweh Shire Mayor Shaun Radnedge said it was a "heartbreaking day" for the Charleville community. "Charleville is a small community, these events have profound impact, obviously people in our community will be shocked and saddened and looking for support," he said.“There will be ripples go through our community and we ask that when the information does come out of the families that have been affected by this, that we give them privacy and let them process what has happened."Cr Radnedge said he had "every confidence" police would conduct a thorough investigation, and asked "that the community come together and support each other in any way we possibly can".The Ethical Standards Command is investigating.