Indore: Protest was staged by National Students Union of India (NSUI) at Gujarati Professional College in Vijay Nagar area on Friday. In an incident on Thursday, few students of the college were celebrating a friend’s birthday following which a teacher slapped one of the students. NSUI members protested at the college and demanded action against the teacher. NSUI members said that the director informed that the concerned teacher was on leave and they will talk to him on Saturday following which action will be taken.