Ahead of their participation in the students' protest over job reservations in Jammu and Kashmir, former Chief Minister Mehbooba Mufti, National Conference (NC) MP Aga Syed Ruhullah Mehdi, Peoples Democratic Party (PDP) MLA Waheed Para and former Srinagar Mayor Junaid Azim Mattoo on Sunday alleged that they have been placed under house arrest in Srinagar.