A Nihang Sikh, part of the ongoing Quami Insaaf Morcha near YPS Chowk, was grievously injured after he was attacked by fellow Nihangs with swords following an altercation, near a park in Sector 52 on Saturday night. The victim, identified Babbar Singh alias Chanddi Nihang, 29, of Manimajra, has received a deep cut on his left wrist, besides two wounds …