Afghan Muslim clerics and tribal elders have urged U.S. authorities to quickly investigate allegations that U.S. interrogators desecrated the Muslim holy book.

The clerics and tribal elders gathered Sunday in Faizabad, the capital of Badakhshan province, to pass a resolution demanding a reaction from U.S. authorities within three days.

Their call came after four days of deadly anti-American protests following an unconfirmed report in a U.S. magazine that interrogators at Guantanamo military prison allegedly desecrated the Koran.

The Bangladeshi government also condemned the alleged abuses urging Washington to bring those responsible to justice.

A foreign ministry statement said "the incident has hurt the sentiments of Muslims all over the world not least in Bangladesh."

U.S. officials have promised an open investigation into the allegations contained in the Newsweek magazine article, but say that so far they have found nothing to confirm the report.

Some information for this report provided by AP, AFP and Reuters.