Antonia Rabente speaks about the attacks. She is not among the victims
It's the latest in a spate of reported sex attacks in the country which has been rocked by a wave of assaults in Cologne.
Two 14-year-old boys and a 21-year-old man have been held in Weil am Rhein, a small town near the Swiss and German borders, for the suspected rape of a 14 and 15-year-old girl.
The girls were allegedly held for several hours and gang-raped after going to a New Year's Eve party at the home of a 21-year-old man in the village of Friedlingen.
The arrests only emerged last night, despite the suspects being in custody for several days.Prosecutors say they kept tightlipped to protect the victims' identities.
Police officers stand outside the main station in Cologne
Two 14-year-old boys and a 21-year-old man have been held in Weil am Rhein
Cops are still searching for a fourth suspect thought to be the man's 15-year-old brother.
Police said the culprits are not asylum seekers. The 21-year-old and his brother are German citizens, while the 14-year-old boys live in Switzerland and the Netherlands.
Detectives have said they do not believe the incident is connected to the sickening night of sexual attacks in Cologne.
At least 120 women reported being robbed, threatened or sexually molested at New Year celebrations outside the city’s cathedral.
In addition there have also been reports of attacks on women across the country.
More than 50 criminal complaints filed in the northern city of Hamburg, 39 of them for sexual assault. Witnesses described gangs of men who "hunted" their victims outside the nightclubs of the city's Reeperbahn.
One victim said: "I was alone and suddenly I realised men were handling me.
"I pushed away the hands and tried to scream. But when one hand went the next had already come. I felt helpless."
Similar incidents have taken place in Dusseldorf, which have been described as those in Cologne.
Two 14-year-old boys and a 21-year-old man have been held in Weil
Seven criminal complaints of sexual assault are being investigated by Frankfurt Police, including three men who say they were surrounded by a group of 10 men and "massively" groped.
Two 18-year-old women were surrounded and groped by a group of around 15 men in Stuttgart, and later discovered their mobile phones had been stolen.
Police described the suspects as of "Arab appearance". Women have reported sexual harassment on the streets of Bielefeld and in a nightclub by a group of around 150 men described as of "North African appearance".
It comes as it emerged that some of the men involved in the horrific Cologne sex attacks claimed to be Syrian refugees.
Women hold up placards that read "Mrs. Merkel: Where are you? What are you saying? This worries us!"