Clashes between police and students broke out at vocational school at Berliner Platz in Nuremberg, Wednesday after students blocked one of their fellow pupils, a 20 year old Afghan asylum seeker, from being deported.The school students surrounded the police car containing the student due for deportation to block his departure. The demonstration turned violent with police using tear gas and batons against the students, some were arrested.A deportation of Afghan asylum seekers from Germany was planned on the same day, spurring protests around the country, but was cancelled following the detonation of a car bomb in Kabul killing some 80 people and injuring hundreds.