Three Muslim refugees were arrested with others being sought for sexually assaulting at least 18 women at a free concert in the city of Darmstadt.
The attack is said to be a copy of the New Years Eve sex attacks in Cologne.
According to police, at least 18 women were touched, fondled and groped by refugees and the number of complaints could rise.
MORE: Victim gives first-hand account of her sexual assault at the hands of Muslim refugees in Cologne, Germany
The complainants say they surrounded by the men before being touched and fondled inappropriately.
The Schlossgrabenfestes music festival did not have an entrance fee which made the women easier targets for the refugees.
According to The Mirror, at least 15 more women are expected to come forward to file criminal complaints after they too were sexually assaulted on Sunday, with the festival's attendance being around 100,000.
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So far, three men from Pakistan between the ages of 28-31 have been arrested. Police are hunting for their accomplices.
If they are found guilty in court, the Pakistanis will face deportation.