MIAMI: Controversial US pastor Terry Jones has burned more copies of the Quran and a depiction of the Prophet Mohammed to protest the imprisonment in Iran of a Christian clergyman,as reported.

The newspaper said Jones and another pastor, who carried out their protest in front of their church in Gainesville, Florida on Saturday, demanded the release of Christian pastor Youcef Nadarkhani from an Iranian prison.

Jones said Nadarkhani faces execution.

According to the report, the Pentagon urged Jones to reconsider, expressing concern that American soldiers in Afghanistan and elsewhere could be put at greater risk because of the act.

In March 2011, Jones' assistant, Pastor Wayne Sapp, burned a copy of the Quran and broadcast the ceremony on the Internet.