Sinha filed his nomination from Patna Sahib constituency in Bihar as a BJP candidate but the event was marred by violence as his supporters beat up a group of youth who showed black flags to the actor-turned-politician when he was on his way to submit the papers.
Of the five states, Delhi witnessed the highest number of high-profile personalities entering the poll fray, including Ajay Maken and his and Sandeep Dikshit of Congress, BJP spokesperson Meenakshi Lekhi and Ashutosh of AAP.
Maken had won unopposed the US-style primaries, a brainchild of Rahul Gandhi, to select the party's choice of nominee for the constituency.
Aam Aadmi Party has fielded journalist-turned-politician Ashish Khetan from the seat. He filed his nomination papers yesterday.
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Ashutosh filed his papers from Chandni Chowk constituency where he will challenge union minister Kapil Sibal of Congress and BJP veteran Harsh Vardhan in what promises to be a mouth-watering clash.
Congress nominee and sitting MP Sandeep Dikshit also jumped into the fray from East Delhi constituency where he takes on BJP's Maheish Girri and AAP's Rajmohan Gandhi.