Hyderabad, April 15 (IANS) Spiritual leader Sathya Sai Baba continues to be stable but critical, doctors attending on him said Friday.

According to the medical bulletin issued by Sathya Sai Super Speciality Hospital at Puttaparthi in Anantapur district, where he is admitted, most of his vital systems have shown positive response to the treatment being given to him, but the response is slow.

"All his clinical parameters of health are nearly normal and are showing improvement over the previous values. He continues to be on assisted ventilation and on intermittent dialysis," said the statement by hospital director A.N. Safaya.

"The panel of doctors is satisfied with the response shown by him to the treatment. However, his condition continues to be critical," it added.

The 85-year-old Baba, who has millions of devotees in India and abroad, is suffering from multi-organ dysfunction.

He was admitted to the hospital March 28 with pneumonia and breathing problems. The doctors implanted pacemaker to regulate his heartbeat.

Meanwhile, hundreds of devotees of Baba in the pilgrim town of Puttaparthi continued to hold congregations, praying for his speedy recovery.