New Delhi, Feb 14 (ANI): Delhi Chief Minister Arvind Kejriwal on Sunday was shown black flags by the Bharatiya Janata Party (BJP) workers during the inauguration ceremony a poly clinic at Seelampur here on Sunday. Kejriwal was about to inaugurate the polyclinic when members of the north-east wing of Delhi BJP started showing placards and black flags. Around 20 polyclinics were simultaneously being inaugurated across the city when the incident took place.