Arvind Kejriwal thanked people for appreciating the work done by his party's government.
As the Aam Aadmi Party won the Rajinder Nagar Assembly bypoll in Delhi, its national convenor Arvind Kejriwal on Sunday called it defeat of the BJP's "dirty politics" and thanked people for appreciating the work done by his party's government in the national capital.
The Aam Aadmi Party's Durgesh Pathak on Sunday defeated BJP candidate Rajesh Bhatia by a margin of over 11,000 votes in the bypoll, officials said.
"All 16 rounds of counting have been completed. AAP candidate Durgesh Pathak has defeated his immediate rival Rajesh Bhatia (of BJP) by a margin of over 11,000 votes," Delhi Chief Electoral Officer Ranbir Singh said.
Thanking the people, Mr Kejriwal tweeted in Hindi, "Heartfelt thanks to the people of Rajendra Nagar. I am grateful for this immense affection and love of the people of Delhi. This inspires us to work harder and serve."
"People defeated their dirty politics and appreciated our good work. Thank you Rajendra Nagar, thank you Delhi," he added.
As Mr Pathak headed towards winning the seat with a comfortable margin, congratulatory messages began pouring in with senior AAP leader and Delhi Deputy Chief Minister Manish Sisodia saying the poll results show that Kejriwal lives in the hearts of the people.
"Many many congratulations to my dear brother @ipathak25 (Durgesh Pathak) on being elected MLA from Rajendra Nagar Vidhan Sabha. Congratulations to all the workers of AAP for the victory," Mr Sisodia tweeted in Hindi.
"In the heart of the people of Delhi, @ArvindKejriwal ji lives," he added.
According to official data, AAP's Mr Pathak polled 40,319 votes, while his nearest rival Mr Bhatia managed to get 28,851 votes. The victory margin was 11,468 votes.
Congress contender Prem Lata could get only 2,014 votes in the bypoll.
The poll panel is yet to come out with the final voting figures.
The bypoll to the crucial assembly seat had taken place on June 23 with a low turnout at 43.75 per cent. Fourteen candidates threw their hats in the fray, which has largely been seen as a battle between a confident AAP and a spirited BJP.
Counting of votes had begun at 8 am amid tight security arrangements.
(Except for the headline, this story has not been edited by NDTV staff and is published from a syndicated feed.)