Kashmiri separatist leader Syed Ali Shah Geelani suffered a minor heart attack on Thursday and has been admitted to a hospital in New Delhi
Sources close to him said doctors are conducting medical tests to ascertain his medical condition.
"It was a minor heart attack. Thank god, he is stable," spokesman Ayaz Akbar told IANS.
Akbar said Geelani, 86, was admitted to the Max Hospital in Saket in south Delhi where he was "recuperating fast". Geelani has been in Delhi for the past few weeks.
Geelani heads the hardline faction of the Hurriyat Conference and is a vocal supporter of Jammu and Kashmir's merger with Pakistan.
