CHICAGO (CBS) — A couple in their 60s and 34-year-old their son were found dead Sunday night in Merrillville, Indiana, in what police said is an apparent murder-suicide.

Police were called to a home in the 3600 block of West 79th Avenue just after 10:30 p.m. Sunday. When they made it inside, they found a grisly scene; three people had been shot and killed.

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The Lake County Coroner’s Office was called in, and authorities quickly determined it appeared an elderly couple had been killed by their son, who then turned the gun on himself.

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Police said 66-year-old John Meeks and 65-year-old Olga Meeks had been shot in the head. Their son Eric Meeks, 34, was also found dead from what appeared to be a self-inflicted gunshot wound.

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Further details were not immediately available.