Former BJP leader Jaswant Singh is in "very critical" condition after suffering a head injury at his home on Friday, the government said.

A defence ministry statement said: "At present the condition is very critical. He is on life support systems and under constant monitoring by a team of neurosurgeons and critical care providers."

Jaswant Singh's condition 'very critical', says the Defence Ministry in this statement just out. pic.twitter.com/0JddPhVrsn Shiv Aroor (@ShivAroor) August 8, 2014

Prime Minister Narendra Modi on Friday spoke to the family of former union minister Jaswant Singh who was operated upon after sustaining a head injury and prayed for his "speedy recovery".

"The PM spoke to the family of former union minister Jaswant Singh this morning. He prays for Singh's speedy recovery," the PMO tweeted.

The former Bharatiya Janata Party (BJP) leader was admitted to the Intensive Care Unit (ICU) of the Army Research and Referral hospital here early on Friday.

Singh is under the observation of neurosurgeons and critical care specialists, a doctor at the hospital requesting anonymity said.

Meanwhile, a staff member at senior BJP leader L.K. Advani's residence here said the leader was present at the hospital and added that, as per information, Singh had been operated upon and that the operation "went well".

Singh, who held many portfolios including Finance, External Affairs and Defence minister during the NDA regime from 2004-2009, was expelled from the BJP in March this year after he refused to withdraw his candidature as an independent candidate from Barmer in Rajasthan ahead of Lok Sabha polls.

Singh had lost Lok Sabha elections against the BJP's Col. Sonaram Choudhary.

