Updated

The Latest on the deaths of six people found in a Chicago home:

6:45 p.m.

A relative of the family that lived in a Chicago house where six people were found dead in an apparent multiple homicide says they seemed happy and that "everything was fine."

Twenty-nine-year-old Noemi Martinez spoke to The Associated Press in Spanish in a phone interview from Dallas. She said the family had lived in their home for about a decade and were originally from the Mexican state of Guanajuato. She says her husband was nephew and cousin of the residents of the house on Chicago's South Side.

Martinez says she doesn't understand what happened at the home.

Martinez says the father worked at a Chicago factory and his wife stayed at home. She says they had a son who worked as a janitor at O'Hare International Airport and a daughter with two children.

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6 p.m.

Chicago police say the bodies of four men, one woman and a child have been found inside a home on the city's South Side in what is being investigated as an apparent multiple homicide.

Interim Chicago Police Superintendent John Escalante said Thursday that it appears to be an isolated incident and there was no wider threat to the community, but police added extra patrols in the neighborhood as a precaution. Asked whether it could have been a murder-suicide, he said it was "a possibility."

Authorities are still working to identify the dead. Escalante says it's probable they were all family members.

He says police entered the house in Chicago's Gage Park neighborhood after receiving a call from a co-worker to check on person who lived there. The person had missed two days of work, which was unusual.

Authorities have not determined how the people died.

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Items in this story have been updated to clarify police comments about the possibility of murder suicide and to reflect that it's not clear whether police were checking on a man or a woman in the home.