The top leadership of the Bharatiya Janata Party has cracked the whip against party MLA Surendra Singh over his statements regarding the firing incident in Ballia district in Uttar Pradesh. BJP National President JP Nadda on Monday dialled party's Uttar Pradesh chief Swatantra Dev Singh and asked him to tell the MLA to stay away from the Ballia probe, sources said. BJP chief JP Nadda also directed the state party chief to issue a show-cause notice to MLA Surendra Singh. Watch the video.