In the wake of Sonbhadra massacre and Congress leader Priyanka Vadra's illegal detention by Uttar Pradesh Police, Congress MPs staged a protest outside Parliament House today. On Wednesday, 10 people, from the Gond tribe, were killed and two dozen injured in a caste clash over a land dispute in Murtiya village in Sonebhadra. Following which Priyanka was on her way to Sonebhadra to meet the victims' families when she was detained at Narayanpur in Mirzapur.