The young couple were camping in the Siegaue nature reserve north of the former German capital of Bonn on Saturday night when a man approached their tent, police report.
Holding a large knife the man threatened the couple, before demanding that the 23-year-old woman leave the tent with him. Spiegel reports that the weapon theman was holding was a machete.
He then raped her in front of the tent before running off into the night in the direction of the Rhine river. A medical assessment on Monday confirmed that the rape took place
A police facial composite of the attacker. Source_: Polizei Bonn
The 26-year-old boyfriend managed to alert the police and ambulance crews, who took his girlfriend to hospital.
Police are now searching for a man they describe as aged between 20 and 30, 180 cm tall and dark skinned. Despite deploying helicopters and sniffer dogs, investigators had failed to catch the brutal attacker by Monday afternoon.
At the time of the incident he was wearing light jeans and a summer jacket. He spoke to the couple in broken English.
People with information relating to the crime are encouraged to call the police on 0228-150.