Banks offered RON1.24 billion, but the ministry rejected all yields above 6.1%.
At the latest successful similar auction July 16, the ministry sold RON185 million of two-year paper at an average yield of 5.98% a year.
Romania expects to sell RON3.3 billion in debt this month, up from RON1.4 billion sold in August.
So far in 2012, the ministry sold roughly RON42.3 billion in leu-denominated state notes and $2.25 billion in US dollar-denominated bonds.
Last week, Romania raised another EUR750 million via a tap of its 6.5% June 2018-dated eurobond at an annual yield of 5.15%, which was below the initial guidance of 5.25%. (EUR1=RON4.5073)