Myanmar's admission that soldiers were involved in the murder of 10 Muslims in September was an important step and the United States hoped it would be followed by more transparency and accountability, the U.S. ambassador said on Thursday.

The European Union and representatives of Muslim nations renewed calls for a broader international investigation into violence in the western state of Rakhine, after the military said on Wednesday its soldiers had killed 10 captured Rohingya Muslim "terrorists" at the beginning of September.

It was a rare acknowledgment of wrongdoing by the Myanmar military during the operation it launched in northern Rakhine in response to Rohingya militant attacks on Aug. 25. Since then, more than 650,000 Muslim villagers have fled to Bangladesh.