Halloween turned deadly Thursday night after separate shootings more than 2,000 miles apart left four people dead in California and a 7-year-old trick-or-treater critically wounded in Chicago.

In Orinda, Calif., four were shot to death and four others were wounded shortly before 11 p.m. at a Halloween party near San Francisco where about 100 guests attended, police said. The party was at an Airbnb rental in a neighborhood of multimillion-dollar homes.

According to The San Francisco Chronicle, the homeowner, Michael Wang, said he rented the property for what he thought would be a family reunion for a dozen people.

As officers responded to the residence about 10:45 p.m., four people were found dead on the scene. As of Friday, no arrests had been made.

»RELATED: Long Beach, California, shooting: Suspect sought after 3 killed, 9 hurt at Halloween party

The shooting came two days after three people were killed and nine injured at a Halloween party in Long Beach, Calif.

In Chicago, a 7-year-old girl in a bumblebee costume was trick-or-treating with her family when she was struck by a bullet in the upper chest, police said.

Trick-or-treaters walk past a crime scene in the 3700 block of West 26th Street, where a 7-year-old girl was shot while trick-or-treating, in Chicago.

Credit: John J. Kim

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Credit: John J. Kim

Police said shots rang out about 5:30 p.m. as a group of men chased another man down the street of the Little Village neighborhood on Chicago’s West Side. A 30-year-old man was also wounded in the hand and taken to a nearby hospital in good condition.

Chicago police said Friday they are questioning a juvenile about the shooting, according to spokesman Anthony Guglielmi. In a tweet, he said the girl was believed to be an innocent bystander.