The Reserve Bank of India is set to reverse monetary policy tightening over growth concerns, central bank chief Duvvuri Subbarao told the BBC in an interview on Monday.

But he added that it was difficult to say when that will take place and in what shape it will roll out.

The RBI has raised key rates 13 times since March 2010 to curb stubbornly high inflation. But it maintained the rates at its December monetary policy meeting.

Although inflation still remained a risk, the central bank is aware that it should support growth now. The balance between growth and inflation will shift in 2012, he noted.