COLOGNE — German police informed that the protests proceeded in a peaceful manner ahead of Turkish Prime Minister Recep Tayyip Erdoğan's address on Saturday at Lanxess Arena. In a written statement, police mentioned that from time to time police intervened with protesters when they resorted to extreme acts. Four members of The far-nationalist group 'Pro NRW' were taken into custody for vandalism and bodily injuries.One person was detained over carrying placards that depicted Erdoğan's image with National Socialism marks.Meanwhile four people were detained by German police while they interrupted PM Erdoğans' convoy car nearby Ottoplatz square.