New Delhi, April 10 (ANI): Polling began on Thursday in Delhi, in the phase three of the nine-phase of 16th Lok Sabha elections. Delhiites are voting to elect their seven representatives from the seven constituencies of Delhi which are- Chandni Chowk, North East Delhi, East Delhi, New Delhi, North West Delhi, West Delhi and South Delhi. Voters have queued up outside the polling booths eagerly waiting for their turn. Security forces have stepped up safety measures to ensure safe and fearless environment for voters. With the emergence of the Aam Aadmi Party in 2012, the voters here will witness a triangular fight on all the seven Lok Sabha seats between Congress, BJP and AAP. As many as 150 candidates, including Kapil Sibal (Congress), Harsh Vardhan (BJP), Rajmohan Gandhi (AAP), Manoj Tiwari (BJP), Ajay Maken (Congress) are in the poll fray.