Image caption Terry Jones said he had prayed over the matter but insisted the Koran-burning would go ahead

A small US church says it will defy international condemnation and go ahead with plans to burn copies of the Koran on the 9/11 anniversary.

The top US commander in Afghanistan warned troops' lives would be in danger if the Dove World Outreach Center in Florida went ahead.

US Secretary of State Hillary Clinton said the church's plan was "disrespectful and disgraceful".

Muslim countries and Nato have also hit out at the move.

And the US Attorney General, Eric Holder, called the idea "idiotic and dangerous".

But organiser, Pastor Terry Jones said: "We must send a clear message to the radical element of Islam."

Analysis The Dove World Outreach Center may only represent a handful of people, but its incendiary plans haven't emerged out of nowhere. The role of Islam in America has become a hot button issue with social and political implications. While most Americans would probably take issue with exhortations to burn the Koran, there is clearly widespread concern about the influence of Islam. Protests over the planned location of an Islamic centre close to Ground Zero in New York, and similar controversy in Murfreesboro, Tennessee, have highlighted popular anxiety about Islam in America. Earlier this year, an opinion poll found that 53% of Americans view Islam unfavourably, with only 42% viewing the religion favourably. Reports about young American Muslims being radicalised on the internet have helped to stoke fears about the nature of a religion indelibly associated, since 9/11, with a violent assault on the US. Far from subsiding over time, anxiety seems to have deepened. As a result, American Muslims say they feel more isolated than at any time since the 2001 attacks.

The controversy comes at a time when the US relationship with Islam is very much under scrutiny.

There is heated debate in the country over a proposal to build a mosque and Islamic cultural centre streets from Ground Zero, site of the 9/11 attacks, in New York.

Speaking at a State Department dinner marking the Muslim holy month of Ramadan, Hillary Clinton condemned Pastor Jones.

"I am heartened by the clear, unequivocal condemnation of this disrespectful, disgraceful act that has come from American religious leaders of all faiths," she said.

Despite having a congregation of just 50, the plans of Pastor Jones' church in Gainesville have gained worldwide notoriety, sparking demonstrations in Afghanistan and Indonesia.

Gen David Petraeus, the top US commander in Afghanistan, said on Monday that the action could cause problems "not just in Kabul, but everywhere in the world".

"It is precisely the kind of action the Taliban uses and could cause significant problems," he said in a statement.

The Vatican, the Obama administration and Nato have also expressed concern over the plan.

White House spokesman Robert Gibbs said on Tuesday that "any type of activity like that that puts our troops in harm's way would be a concern".

Dove World Outreach Center Evangelical Christian church in Gainesville, Florida, with 50 members

Founded in 1986; led by the Reverend Terry Jones since 1996

Follows the Pentecostal tradition

Calls on Christians to "return to the truth and stop hiding", and to "speak up against sin"

Says Islam "is of the devil" because it teaches that Jesus is not the son of God

Describes International Burn a Koran Day as "neither an act of love nor of hate" Profile: Dove World Outreach Center Muslim media reaction to the plans Send us your comments

Nato chief Anders Fogh Rasmussen blasted the plans, telling reporters that burning Korans violated the Nato alliance's "values".

Pastor Jones - author of a book entitled Islam is of the Devil - has said he understands the general's concerns but that it was "time for America to quit apologising for our actions and bowing to kings".

Another pastor at the church told the BBC that members intended to burn several hundred copies of the holy book on Saturday evening, the ninth anniversary of the 9/11 attacks, in defiance of an order by the city not to hold an open air bonfire.

Muslims consider the Koran to be the word of God and insist it be treated with the utmost respect. Any intentional damage or show of disrespect to the holy book is deeply offensive to them.

An interfaith group of evangelical, Roman Catholic, Jewish, and Muslim leaders meeting in Washington on Tuesday condemned the proposals as a violation of American values and the Bible.

Media playback is unsupported on your device Media caption Religious leaders have issued a statement condemning the church's actions

"I have heard many Muslim Americans say they have never felt this anxious or this insecure in America since directly after 11 September," said Ingrid Mattson, president of the Islamic Society of North America.

Claims that US soldiers have desecrated the Koran in both Afghanistan and Iraq have caused bloodshed in the past.

There were deadly protests in Afghanistan in 2008, when it emerged that a US soldier deployed to Iraq riddled a copy of the holy book with bullets.

And further lives were lost in Afghan riots in 2005 when Newsweek magazine printed a story alleging that US interrogators at Guantanamo Bay had flushed a copy of the Koran down a toilet.

The story later turned out to be false and was retracted by the magazine.