The Isis jihadist group appears to have released a new set of images showing a rare public appearance by its leader, Abu Bakr al-Baghdadi.

The self-proclaimed "caliph" was last captured on camera in July 2014, when he gave a speech to followers at a mosque in Mosul.

It is impossible to verify the new images, but Isis supporters on social media claim they show Al-Baghdadi speaking to children at a mosque in Fallujah, Iraq.

The risk to the Isis leader's life is such that he no longer addresses large gatherings. The US has placed a $10 million bounty on his head, making him one of the most wanted terrorists in the world.

The undated images claim to show Al-Baghdadi addressing a mosque

Isis supporters claim their leader was addressing children in Fallujah, Iraq

It is impossible to verify the images, which come around 15 months since Al-Baghdadi was last photographed in an address at a mosque

If they do show Al-Baghdadi, the new images do not teach us much we didn't already know about the reclusive militant chief.

Some Isis followers have suggested that a man shown in the far-right on one of the images is the leader's "double" - a logical safety measure given the number of Isis convoys that have been targeted by international air strikes.

The lack of public appearances by Al-Baghdadi tends to fuel speculation that he has been injured or killed, with rare audio statements often the closest thing we have to proof he is still alive.