Police officers stand deployed in a large scale operation at the clubhouse of motorcycle gang 'Bandidos' in Duisburg, Germany, 31 October 2009.

Violent clashes between motorcycle gangs 'Hells Angels' and 'Bandidos' continue as both clubs 31 October organized a fight between the gangs in Duisburg's red light district, police said. 'Hells Angels' members armed with batons entered the clubhouse of 'Bandidos', and few hours later 'Bandidos' took revenge and threw a hand grenade into 'Hells Angels' clubhouse in near-by Solingen.