to go out alone at night, after a spate of sexual assaults against women and girls by immigrant men. The warning was criticized by the city's Social Democrat mayor and others. 9 March: Balkan countries announced tighter restrictions on migrant entry, in a bid to close the 'Balkan route'. Slovenia, Croatia, Serbia and Macedonia announced that only migrants who plan to seek asylum in the country, or those with clear humanitarian needs will be allowed entry and that those without valid documents will be turned back. Hungary declared a state of emergency due to the migrant crisis, and deployed additional police and military at the borders. German Chancellor Angela Merkel condemned the "unilateral" closure of the Balkan route. 12 March: In Berlin, about 3,000 people took part in a protest march against the German government's 'open door' asylum policy. It drew ten times more protesters than police had expected. The march was met by a 1,000-strong counter-demonstration. 12 March: In Calais, more than 130 activists from the Identitarian movement blocked roads leading from migrant camps to the town centre. The activists set up barricades, burnt tyres and carried banners with slogans such as 'Defend Calais'. There were clashes as riot police forcibly dispersed the activists and 14 arrests were made. 13 March: The right-wing nationalist party Alternative for Germany (AFD) made strong gains in German state elections. The party campaigned against mass immigration and the German government's 'open door' asylum policy. 18 March: The EU and Turkey agreed a deal to tackle illegal (or 'irregular') migration. From 20 March, irregular migrants arriving in Greece will be sent back to Turkey if they do not apply for asylum or their claim is rejected. Each Syrian sent back will be replaced with a Syrian refugee who will be resettled in the EU. Turkey will take tougher action to prevent illegal migration. In return, the EU will send Turkey €3 billion to help it host refugees and will allow Turkish citizens to travel freely into the Schengen zone by June. April 2016 3 April: Hundreds of 'No Borders' activists protested at the Brenner Pass, on the Italy–Austria border, against Austria's plans for stricter border controls. Clashes broke out when activists tried to march into Austria. Some threw stones at Austrian police and tried to break through police lines. Austrian police forced them back with batons, shields and pepper spray. Ten protesters and five