New Delhi, Aug 27 (IANS): Doctors attending on Anna Hazare Saturday expressed worry over the fasting social activist's falling blood pressure and said he should end his fast, which entered day 12, as his health has begun to deteriorate.

"Blood pressure that was earlier steady has come down and his heart rate has increased. The cause of worry is the falling blood pressure," Naresh Trehan who is monitoring Hazare's health along with his team, told reporters here at Ramlila Maidan.

"His blood pressure has come down from 140 mmHG (millimetres of mercury) to 120 mmHG," Trehan said. "We have taken blood samples. Results will be available by evening."

Another doctor from the team, on condition of anonymity, said: "Anna Hazare has lost seven kg and he is feeling weak and tired."

"He should end his fast as soon as possible as his health is deteriorating. His complexion shows his health condition - he has turned dark due to dehydration," he added.

Doctors have suggested to Hazare to increase his fluid intake.

Hazare, 74, has been surviving only on water since Aug 16, when he started his fast against corruption.