Abu Bakr al-Baghdadi, the secretive leader of the "Islamic State" (ISIS) terrorist group, called for an uprising in Saudi Arabia and pledged to attack Israel, in an audio recording released Saturday and attributed to him.

The 24-minute recording would be Baghdadi's first in seven months, during which ISIS has been dealt several blows in Iraq and Syria.

There was no way for AFP to authenticate that it was Baghdadi speaking, but the voice appeared to match previous recordings of him. And it was not clear when the recording was made, but it referred to a 34-nation anti-ISIS coalition announced by Saudi Arabia on December 15.