A file photo of the murdered Chinese architecture student in German state of Saxony-Anhalt. [Photo: mt.sohu.com]

After the violent death of a Chinese architecture student in German state of Saxony-Anhalt, German investigators arrested a couple under suspicion of murder on Tuesday.

The prosecutor had accused the 20-year-old man and his partner of a sexual offense followed by murder.

According to the German newspaper Bild, DNA collected from the victim's body should have led to the suspects. The couple had not yet made a confession, investigators announced on Tuesday.

The suspect, the son of a police officer, had turned himself into the police, but only admitted that he and his girlfriend had met for consensual sex with the Chinese.

According to investigators, the crime scene was a former home of the suspects in the center of German city Dessau. The body of the student was found in front of this house.

The local public prosecutor's office has requested arrest warrant for murder.

The 25-year-old Chinese woman who had studied at Anhalt University of Applied Sciences died of serious injuries to the head and face, according to the autopsy.

The student had not returned on the evening of May 11 from jogging back to her apartment. Her body was then found two days later in a bush.