Jaswant's supporters and well wishers started the yagya at the Muketeshwar Mahadev Temple premise for his long life, Pooran Singh Bhati, chairman of Jaisalmer Development Bank, said.
Some other fans of Jaswant held a similar yagya at Baisahki village yesterday, Bhati said.
Jaisalmer Rotary Club President Mayan Bhatiya and a young BJP leader were also separately holding prayers for Jaswant's recovery from coma.
Singh, who had also served as External Affairs, Defence and Finance Minister in Vajpayee government, was expelled from the BJP early this year after he decided to contest the Lok Sabha polls from Barmer in Rajasthan as an Independent after being denied a ticket.