Two bodies were discovered in a parking garage at Frankfurt Airport, police said on Friday.
The bodies of a man and a woman were found lying on the ground in the parking garage at around 3 am (0100 GMT), a police spokesman said.
Police found a weapon on the 47-year-old man. The woman is reportedly 50 years old.
The investigation is ongoing, the police spokesman said, and further details were not initially known in the morning.