Thiruvananthapuram (Kerala) [India], August 27 (ANI): Amid a clash between the Akhil Bharatiya Vidyarthi Parishad (ABVP) and Communist Party of India-Marxist (CPI-M), nine people on three bikes threw stone at the latter's office in Thiruvananthapuram's Vanchiyur, Trivandrum Commissioner Sparjan Kumar informed on Saturday.