All of them exercised their franchise in the national capital. Sonia Gandhi showed her inked finger to the gathering after casting her vote at the Nirman Bhawan polling booth.
Other prominent voters were Priyanka Gandhi and her husband Robert Vadra in Lodhi Estate.
Kejriwal, whose AAP did surprisingly well in assembly polls and even formed a government for a short period, said he is confident of AAP winning the seven Lok Sabha seats in Delhi.
Brisk polling was reported across the 11 states and three Union Territories (UTs) in the third phase of the Lok Sabha elections on Thursday morning.
Polling is being held across 91 Lok Sabha constituencies in Delhi, Kerala, Odisha, western Uttar Pradesh, including riot-hit Muzaffarnagar, Vidarbha region of Maharashtra, Vindhya region of Madhya Pradesh, plains of Jammu, Maoist-hit Jharkhand and Chhattisgarh, Bihar, Chandigarh, Haryana, Andaman and Nicobar Islands and Lakshadweep. Odisha is also witnessing an assembly election.
Two Central Reserve Police Force (CRPF) jawans were killed and three others were injured in an improvised explosive device (IED) triggered by Maoists on Thursday, said reports.
On the other hand, Rashtriya Swayamsevak Sangh (RSS) chief Mohan Bhagwat cast his vote in Nagpur city of Maharashtra.
Gujarat Chief Minister and Bharatiya Janata Party (BJP)'s prime ministerial candidate Narendra Modi urged voters to exercise their franchise in large numbers.
"All those voting today in 91 Lok Sabha seats, 70 seats for Odisha Vidhan Sabha & by-election in Maharashtra should vote in record numbers," tweeted Modi.
Thursday's elections will decide the fate of top leaders like union ministers Kamal Nath, Kapil Sibal, Ajit Singh, former BJP president Nitin Gadkari, retired Army chief General VK Singh, Aam Aadmi Party (AAP) candidates Yogendra Yadav, Ashutosh and Shazia Ilmi.
In Delhi, over 12 million voters exercise their franchise and choose their representatives for seven constituencies between three main political parties - the Congress, the Bharatiya Janata Party (BJP) and the AAP.
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