About 30 German police officers have been injured while trying to separate competing rallies by an ultra-conservative Muslim group and a small far-right march.
Police in the western German city of Bonn said Sunday about 100 Salafist protesters were arrested after they started attacking security forces separating the two rallies late Saturday.
They say 29 officers were injured, two of whom were hospitalized with serious wounds after being stabbed.
Several hundred Muslims protested against the rally of about 30 supporters of the local far-right party Pro NRW, which has angered Muslims by showing unfavorable cartoons depicting Islam's Prophet Muhammad.
Similar clashes between Salafists and Pro NRW erupted last weekend, leading to the temporary arrest of 81 Salafist protesters.