UC3 Nautilus
Engineer Peter Madsen built the UC3 Nautilus submarine. Getty Images

Divers who previously discovered a body part in the waters off Copenhagen uncovered another arm on Wednesday. Authorities said they believed the arm belonged to Swedish journalist Kim Wall who died in August on Danish engineer Peter Madsen’s submarine.

The divers found a second arm bogged down by weights in Koge Bay off Copenhagen, akin to how they discovered Wall’s left arm last week, ABC News reported.

"We therefore assume that the arm is connected to the submarine case," Copenhagen police chief investigator Jens Møller Jensen said in a statement. "First and foremost, this has ethical significance for Kim Wall’s family. They are now able to bury a whole person."

The arm was delivered to the Department of Forensic Medicine in Copenhagen where coroners will run tests on Thursday.

Divers discovered Wall’s left arm on Nov. 21 in the same area near Koge Bay in Copenhagen. Police said on Aug. 23 that a decapitated female torso found off Koge Bay was Wall’s. In October, police discovered her head and her legs.

Wall, 30, visited the UC3 Nautilus submarine in Copenhagen this summer to interview Madsen, where she was last seen, according to police. Wall’s cause of death had not yet been determined.

Madsen, 46, confessed to mutilating Wall on his submarine and releasing her body parts in the surrounding water. He claimed that her death was an accident and that she died below deck while he was above deck. Madsen and Wall were the only two on board at the time, police said. He also admitted to weighing down the body by tying weights to it.

"If I had been able to hold my footing, we would not be sitting here today. The latch was moving and I could not hold onto it," Madsen said during a September court hearing. "That's why we are here today."

Police stated during a previous hearing at Copenhagen City Court that a forensics exam found 14 stab wounds in Wall’s abdomen.

Madsen was charged with manslaughter, along with charges of indecent handling of a corpse and sexual assault without intercourse. He denied two of the charges but pled guilty to the indecent handling of a corpse. The trial was set to begin Mar. 8, 2018.