Prosecutors in Denmark charged the inventor and private submarine-owner Peter Madsen for the murder of Swedish journalist Kim Wall on Tuesday.

Police were not able to determine precisely how Wall died, but the indictment states they believe Madsen either cut Wall's throat or strangled her on board the submarine. Prosecutors are seeking life imprisonment.

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Madsen is charged with premeditated murder and dismemberment. He has also been charged with sexual assault without intercourse "of a particularly dangerous nature."

Wall, a 30-year-old freelance reporter, was researching a story on the aerospace engineer and entrepreneur when she went missing on board his 17-meter (56-foot) submarine in August last year.

Madsen previously admitted to dumping her body at sea but denied killing her. Police halted the search for the rest of Wall's remains after they uncovered her head, torso, legs and arms in the Bay of Koge near the capital Copenhagen.

The trial is set to start on March 8 with a verdict expected on April 25.

rs/rc (AP, AFP, dpa, Reuters)