"JIHAD"
Earlier on Sunday, several thousand Islamists listened to fiery speeches at a protest meeting at the mosque to mark the first anniversary of the army raid on the complex.
More than 100 people were killed when commandos stormed the Red Mosque complex, which included a madrasa or Islamic seminary, on July 10 last year, after a week-long siege that began when gunmen from the mosque clashed with police outside.
Speakers told the crowd, most of them men, that Musharraf was to blame for the bloodshed last year.
"Pervez Musharraf, you thought you could crush the Islamic movement by attacking the Lal Masjid (Red Mosque), but we are telling you, you have failed," Shah Abdul Aziz, a cleric and former member of the parliament, told the crowd.
"It was done at the behest of America and Bush. But I want to tell America jihad will continue, it will never stop," he said as protesters shouted "al jihad", or holy war.
The mosque's hardline clerics and supporters waged a violent campaign to enforce Taliban-style rule, kidnapping women they accused of prostitution and some policemen, and storming music and video shops and beauty parlours.
They also accumulated weapons and battled security forces for days after the siege began, rejecting calls to surrender.
The assault unleashed a wave of suicide attacks across the country in which hundreds of people were killed, including former prime minister Benazir Bhutto.
Baitullah Mehsud, a Pakistani Taliban leader based in an ethnic Pashtun tribal region on the Afghan border who has links with al Qaeda and banned sectarian militants, has been blamed for most of the attacks.
The new ruling coalition, led by Bhutto's party, has been trying to negotiate peace with him through tribal leaders, although U.S. commanders in Afghanistan say pacts lead to more attacks there.
Despite the peace efforts, security forces launched a sweep on June 28 against militants from another faction in Khyber region who had trying to impose Taliban ways in the nearby northwestern city of Peshawar.
Security around the mosque was tight on Sunday with police blocking roads and frisking many bearded Islamists passing through metal detectors.
"The killers of innocent male and female students do not deserve any mercy," read a banner strung up outside the mosque.
Speakers warned the government against any crackdown on religious schools and said any attempt would be met with force.
