Frankfurt/Main (dpa/lhe) - Several people attacked each other with pepper spray during a physical altercation in Frankfurt. A 22-year-old man was taken to a hospital with serious head injuries, police said on Monday. The reason for the conflict on Sunday evening in the Griesheim district of Frankfurt is still unclear. The officials could not say how the injuries to the 22-year-old came about and how many people were involved in the conflict. A police spokesman said on Monday that there had been several arrests. Several people suffered eye irritation from the pepper spray.