SHIMLA: With Himachal Pradesh University authorities and student unions locking horns over the issue of fee hike, students and staff members have been left in the lurch. On Friday, five senior officers of the university submitted their resignations to the vice-chancellor. On Wednesday morning, vice-chancellor ADN Bajpai expelled nine members of the Students Federation of India, who allegedly manhandled him. On Friday, protesting students were canecharged by the police and many were injured. Around 400 students, including 65 girls were arrested on Friday for violating Section 144, after which two major student unions, the Students Federation of India (SFI) and Akhil Bharatiya Vidhyarthi Parishad (ABVP) decided to join hands for a joint movement against authorities. The ABVP also held a protest demonstration in front of the DC office, Shimla on Thursday.After seven officials tendered their resignation on Thursday, five more officials, director, Population Research Center NS Bisht, director, CCS Meenakshi Soodan, director, UBS Dr SS Narta, director, women's studies, professor Mamta Mokta and director, UIIT Manu Sood resigned on Friday expressing their inability to handle their responsibilities in such a violent atmosphere.Police also attacked mediapersons and threatened to break the cameras if they recorded the event. When the students ran into the main library of HPU, police chased them but were stopped by library officials. Shweta Negi and Khushboo Sharma of the English department said they were injured in the melee.Vijay Saklani, a student of the MCA department said, "My friends and I do not belong to any student union but even then we were stuck in the cane charge. Police started beating my friends without reason and even if students want the decision of the fee hike to be rolled back, there is nothing wrong in that. The condition on campus is like a curfew and students are suffering," he said.