Investigators are working to determine how two children and three adults were found dead in a home in an affluent Chicago suburb.

The discovery was made just after 11 a.m. Wednesday after Buffalo Grove police were dispatched to a single-family residence for a call of a well-being check on a woman, FOX 32 Chicago learned. 

When officers arrived and could not make contact with anyone inside the home, they determined that forced entry was necessary, and a sweep of the home was conducted.

Authorities said they found the five people deceased at that time. The medical examiner's office confirmed to FOX 32 that two of them were children, and three were adults. 

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2 children, 3 adults found dead one

Five people were found dead in a home in north suburban Buffalo Grove, Illinois, on Wednesday. (FOX 32 Chicago SkyFOX)

"It’s just a big shock to have all of this occurring, especially this time of year," a neighbor told the TV station, who added she has seen children playing outside the home.

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Buffalo Grove home

Buffalo Grove, Illinois, police were dispatched to a single-family residence in the 2800 block of Acacia Terrace for a call of a well-being check on a woman. (FOX 32 Chicago SkyFOX)

That same neighbor says she has seen police officers make a few visits to the home lately but did not know the reason. 

Chicago suburb home where five people were found dead

Five people were found dead in a home in an affluent Chicago suburb Wednesday morning. (FOX 32 Chicago SkyFOX)

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Preliminary information shared by police indicates they believe it was a domestic-related incident. There is no threat to the public, police said. 

The names of those found dead inside the home have not yet been released. The coroner's office expects to release more details later Thursday.