ANTI-MIGRANT protesters stormed Cologne's train station and main square in an open act of defiance after police try to ban the demonstration.Members of the far right NDP group planned to take to Cologne's main square, the scene of the depraved New Year sex attacks, to voice their oposition to Angela Merkel's controversial open door migration policy – but police banned the event amid safety concerns. Undeterred, dozens of protesters scaled Cologne's train station, unveiling nationalist banners and chanting anti-mass immigration slogans. In a well-orchestrated and pre-planned move, the NDP supporters clamberd onto the station's roof and revealed their anti-migrant banner.Police earlier cancelled the event, citing "a serious security threat, which cannot be averted otherwise". The original protest was supposed to take place in the square itself, facing the cathedral that was the backdrop to the sickenig volume of sexual assaults committed against hundreds of women.According to Germany's Die Welt news outlet, 267 investigations against 333 suspects were launched in the wake of New Year's Eve's carnage. However, half of the proceedings have been dropped by prosecutors and only 30 people have been convicted.The vast majority of those arested in connection with the assailts were refugees, asylum seekers and migrants.The far right protest was designed to "show solidarity with the women" who suffered that night and to ensure the main square does not become "a no go zone".