Two people were killed and four were hospitalized with life-threatening injuries after gunfire erupted at a Halloween party in Illinois early Sunday morning, police said.

       At least a dozen people were shot at the party on Jackson Street in Joliet Township, the Will County Illinois Sheriff’s Office said. The incident took place around 12:39 a.m. at the backyard of a house where 200 people had gathered to celebrate Halloween.

       The deadly shooting took place outside the residence, near a DJ booth that was set up in the backyard, according to police.

       ABC Chicago station WLS

       Two people were killed on Oct. 31, 2021, during a shooting that took place at a Halloween party at a backyard in Joliet Township, Illinois, police said.

       The shots came "from an elevated position on a porch looking down over the crowd," the sheriff's office said.

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       "Everyone was there having fun, and all of a sudden as we're dancing on the back patio, shots started going off from the porch," a witness told ABC's Chicago affiliate, WLS.

       ABC Chicago station WLS

       Over a dozen people were shot, two fatally, on Oct. 31, 2021, at a Halloween party at a backyard in Joliet Township, Illinois, police said.

       A patrol officer who was nearby responded to the gunshots, and soon, other officers and first responders arrived, the sheriff's office said.

       While first responders were assisting victims, they heard additional shots in the area, according to investigators.

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       The two deceased victims, who haven't been immediately identified, died at the scene, police said.

       ABC Chicago station WLS

       Two people were killed on Oct. 31, 2021, during a shooting that took place at a Halloween party at a backyard in Joliet Township, Illinois, police said.

       The investigation is ongoing but the police said witnesses described at least two shooters.

       ABC Chicago station WLS

       Over a dozen people were shot, two fatally, on Oct. 31, 2021, at a Halloween party at a backyard in Joliet Township, Illinois, police said.

       Anyone with information, cellphone pictures or video of the party or potential suspect information is urged to contact the Will County Sheriff's Office at 815-727-8574, extension 4930.