This photo shows allegedly Swedish journalist Kim Wall standing in the tower of the private submarine "UC3 Nautilus" on August 10, 2017 in Copenhagen Harbor.
The submarine sank in the sea outside Copenhagen Harbor on friday night. Following a major rescue operation, a swedish woman supposed to be on board of the submarine is still missing.  / AFP PHOTO / Scanpix Denmark / Anders Valdsted / ALTERNATIVE CROP         (Photo credit should read ANDERS VALDSTED/AFP/Getty Images)
ANDERS VALDSTED/AFP/AFP/Getty Images
This photo shows allegedly Swedish journalist Kim Wall standing in the tower of the private submarine "UC3 Nautilus" on August 10, 2017 in Copenhagen Harbor. The submarine sank in the sea outside Copenhagen Harbor on friday night. Following a major rescue operation, a swedish woman supposed to be on board of the submarine is still missing. / AFP PHOTO / Scanpix Denmark / Anders Valdsted / ALTERNATIVE CROP (Photo credit should read ANDERS VALDSTED/AFP/Getty Images)
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(CNN) —  

A Danish inventor has admitted to dismembering the body of Swedish journalist Kim Wall on his privately built submarine but continues to deny killing her, Danish police said.

Peter Madsen, who is accused of murdering Wall, now claims she died of carbon monoxide poisoning while he was on deck, police said.

Madsen had previously claimed in court that Wall died accidentally after hitting her head on a hatch in the submarine .

“This explanation of course causes police to want to get further supplemental statements from the medical examiner, as well from the defense ministry’s submarine experts,” chief investigator Jens Moeller Jensen said.

Copenhagen murder: Wall is more than what happened to her say friends

Police divers have been searching the Bay of Koege for the last two weeks – where Madsen, 46, now admits dumping Wall’s dismembered body parts. They have been looking for her arms and both Wall and Madsen’s mobile phones.

Divers from the Danish Defence Command preparing for a dive in  Copenhagen on August 22, 2017 after a woman's torso was found
LISELOTTE SABROE/AFP/Getty Images
Divers from the Danish Defence Command preparing for a dive in Copenhagen on August 22, 2017 after a woman's torso was found

Madsen continues to deny charges of murder and “sexual acts other than intercourse” – a charge stemming from the fact that Wall had 14 stab wounds around her genital area, the statement said.

Wall was last seen in August boarding Madsen’s privately built submarine where she planned to interview him for an article.