A 16-year-old was probably killed in Bavaria.
The young person died of massive external violence, the police and public prosecutor announced on Monday.
A 25-year-old and a 15-year-old known to the police were arrested as suspects.
"How the involvement in the crime are in detail is still the subject of the investigation," said a police spokesman.
The body of the 16-year-old was found on Monday morning near the premises of the Memmingen airport.
It is assumed that the youth had already been killed on Sunday evening, said a police spokesman.
“They knew each other,” he said of the two German suspects and the woman who was killed.
However, the investigators initially did not provide any information about the exact relationship they were in.
"Environment investigations" would have led the police officers to the two suspects so quickly, said the spokesman.
The investigators did not initially say why the man is “known to the police”.
The investigators did not initially provide any further information on the course of events and the motive.
It is not yet possible to say whether the 16-year-old was also killed at the “location” near the airport.
On Monday evening, police officers combed a forest near the site with flashlights and looked for clues.
The girl's parents had informed the police on Monday that their daughter had not been available since Sunday evening.
The suspects are to be brought before the judge on Tuesday.