Former Prime Minister Chandrashekhar, who is suffering from cancer, is in a critical state.
The Samajwadi Janata Party leader has been undergoing treatment at the Indraprastha Apollo Hospital for the past three months, hospital sources said, adding, "He is in a critical state."
Prime Minister Manmohan Singh visited the ailing former premier Chandrashekhar on Saturday night.
The 80-year-old Lok Sabha parliamentarian has been suffering from cancer and has been under intensive care for the past one week.