Police officers in Toronto were called to investigate the discovery of four dead bodies in a Markham home on Sunday (July 28).

Graphic social media posts were believed to have been made by the accused leading to the finding of the bodies.

Police sealed off the major crime scene and homicide detectives were on the case.

Authorities have one person under arrest, the coroner was on the scene to remove the bodies.

York Regional Police tweeted: "This is the scene in Markham where 4 people were found deceased in this residence on Castlemore Ave, east of Mingay Ave. A 20-year-old man is in custody. If you have any info call Homicide Unit at 866-876-5423 x7865."

The suspected killer is reported to have posted images on social media platform Discord.

Police officers in Toronto were called to investigate the discovery of four dead bodies in a Markham home

house and graphic social media post believed to have been made by the accused.

Police sealed off the major crime scene and homicide detectives are on scene as is a police command post, police have on person under arrest, the coroner is on scene to remove the bodies and forensic identification officers are on scene looking for evidence.

Links to local media regarding social media posts by the suspect:

https://www.cbc.ca/news/canada/toronto/menhaz-zaman-discord-chat-messages-images-1.5229187

York Regional Police
‏Verified account @YRP

SUSPICIOUS DEATH INVESTIGATION - This is the scene in Markham where 4 people were found deceased in this residence on Castlemore Ave, east of Mingay Ave. A 20-year-old man is in custody. If you have any info call Homicide Unit at 866-876-5423 x7865