Al-Qaeda posts video of leader al-Zawahiri online

The international terrorist network Al-Qaeda has posted video footage online of its leader Ayman al-Zawahiri mentioning the US withdrawal from Afghanistan.

Al-Qaeda claimed responsibility for the September 11, 2001, terror attacks on the United States. The video is apparently intended to underscore the group's presence on the 20th anniversary of the assaults.

In the hour-long video, al-Zawahiri called for continued resistance against Israel over the Palestine issue. He also mentioned US troops' pullout from Afghanistan after 20 years of military operations.

But he made no mention of the Taliban taking control in Afghanistan last month. When and where the video was filmed also remains unknown.

Al-Zawahiri succeeded Al-Qaeda leader Osama bin Laden, the alleged mastermind of the September 11 attacks who was killed by the US in 2011.

Al-Zawahiri is said to be possibly hiding in the Afghanistan-Pakistan border region. But rumors have often spread that he is dead.

Al-Qaeda is said to be maintaining close links with the Taliban and they are reportedly carrying out military drills together.

The groups' relations have given rise to international concerns that Afghanistan could again be a hotbed of terrorism.