NEW DELHI, Aug. 21 (Xinhua) -- Indian central bank's employees will go on mass leave on Sept. 4 and 5 over long-pending demands relating to retirement benefits like pension.

"To express deep resentment at the attitude of the officials of the government of India, RBI (Reserve Bank of India) staff members have waited too long and the limit of patience is crossing and are left with no alternative but to observe two consecutive days strike action," the employees union said in a statement.

A member of the union said Tuesday that they were fed up with the government's reluctant attitude to address their demands and hence decided to go on mass casual leave. "We are left with no other option to press for our demands," he said, on condition of anonymity.

RBI is India's central banking institution, which controls the monetary policy of the Indian rupee. The RBI plays an important part in the development strategy of the Indian government.