Delavan, Wis. ? A 2-year-old girl was found in a nearby van critically wounded with gunshot in her chest.

James Brandenburg prays outside a house in Delavan, Wis., where a shooting left six people dead and one injured, according to Delavan Police Chief Tim O'Neill on Sunday.

A male family member who escaped the shooting was helping investigators, who refused to release any details but said they don’t believe anyone else was in danger.

“What we have is a complicated death scene and we’re investigating all the possibilities,” said Kevin St. John, a spokesman with the state Justice Department, which is leading the investigation.

Walworth County District Attorney Phillip Koss said the shooting was part of a domestic dispute, but he wouldn’t elaborate until autopsies were completed and the crime scene was fully evaluated.

Police suggested earlier it could be a murder-suicide case.

“I don’t believe they are actively looking for anybody right now,” Koss said. “There are just a couple scenarios here we are not sure about yet.”

Officers, responding to a report of shots fired, stormed the A-frame duplex Saturday night with weapons drawn, kicking in the door, neighbor Richard Heideman said. He saw two paramedics go in behind them and come back out minutes later.

“That’s when I knew everybody was dead,” Heideman said.

The 2-year-old sister of the twins, Jasmine, was in serious condition at University of Wisconsin Hospital in Madison.