Al-Qaida has released a video featuring a senior commander who was rumoured to have been killed in Pakistan in July, threatening more attacks against Denmark after a suicide bombing on its Embassy in Islamabad, according to the SITE group which monitors Islamist websites.

"We have warned previously - and we warn once more - the crusader states which insult, mock and defame our Prophet and Quran in their media and occupy our lands, steal our treasure and kill our brothers that we will exact revenge at the appropriate time and place," Mustafa Abu al-Yazid said in the video, SITE reported on Thursday.

The Embassy in June bombing killed six Pakistanis and came amid anger in the Muslim world over cartoons of the Prophet Mohammed first printed in Danish newspapers in 2005.

There were reports that Yazid was killed in a July air strike on a hideout in a tribal region of Pakistan bordering Afghanistan, but the identity of the slain militant was never confirmed.

Yazid, an Egyptian Al-Qaida commander based in Afghanistan, was identified by the 9/11 Commission as the group's chief financial manager.

The US-based SITE Intelligence Group said the video, released by Al-Qaida's media arm Al-Sahab, shows the Saudi suicide bomber who carried out the attack and an "animation" of the bombing itself.

Yazid said the Embassy attack "is but the beginning. If you don't end your errant ways and aggression," SITE said in a translation of the video message, adding that the date it was recorded was not known.

Six persons, including three women, were killed and 20 others injured in a missile strike by unmanned US drones on a house and a seminary linked to a key Taliban commander Jalauddin Haqqani in Pakistan's restive North Waziristan tribal region on Monday.

The suspected drones operated by the US-led forces in Afghanistan fired six to seven guided missiles at the seminary in Tanda Darpakhel, two kilometres from Miranshah, the headquarters of North Waziristan.

Four missiles hit a madrassa run by senior Taliban leader Jalaluddin Haqqani while three hit nearby houses. A news agency quoted official sources and local residents as saying.
Three female seminary students and three labourers were among the dead, official sources said, but other sources said that among the killed were three militants.

Whether Haqqani, who is a close aide of fugitive Taliban leader Mullah Omar was present in the area or not at the time of the strike, was not known.

The Pasthun leader of Khost in Afghanistan has not seen since the fall of the Taliban regime in Kabul in 2001.

Taliban fighters surrounded the area around the madrassa and did not allow people to approach the site. North and South Waziristan tribal regions are considered strongholds of the Pakistani Taliban led by Baitullah Mehsud.

Since last week, Pakistan's tribal belt has witnessed a sharp increase in attacks by drones operated by US-led coalition forces in Afghanistan. More than 40 people have died in these attacks.

Twenty people, a majority of them women and children, were killed in a raid in South Waziristan by gunship helicopters and commandos of the coalition forces on September three.

That attack marked the first time that US-led ground forces from Afghanistan had intruded into Pakistan.