Haryana DGP said army has been called in to control the situation.
The protestors who had gathered at the Rohtak bye-pass road of Delhi Hissar National Highway turned violent and allegedly attacked police vehicles which were parked there in which window panes were damaged, officials said.
The security personnel deployed there had to use force, including firing, to control the violent mob which also attacked the nearby private residence of Haryana Finance Minister Abhimanyu.
Seeing the situation going out of control, security personnel opened fire in which one person was killed and around 21 others were injured, police said.
"There is one death of an unidentified person because of (suspected) bullet injuries," said authorities of the Post Graduate Institute of Medical Science & Hospital.