Indonesia's thermal coal producer PT Bumi Resources (BUMI.JK) said Tuesday that it has paid $600 million of its debt to China Investment Corporation, or CIC, due in September 2013, as part of its efforts to reduce its debt burden.

The company said in a statement that it has secured the funds via a syndicated loan from Bank of America Merrill Lynch, Deutsche Bank, Barclays Bank and J.P. Morgan.

Bumi added that interest from the banking syndicate was about 6 percentage points above the London interbank offered rate.

"Effectively, this now reduces the interest by [around] $72 million on an annualized basis," Bumi spokesman Dileep Srivastava said in the statement. The company did not detail when the syndicated loan will mature.

-By Linda Silaen, Dow Jones Newswires; +6221 398 31277; andreasismar.sandiwan@dowjones.com