ISIS news update today 2015: Muslim world condemns ISIS killing of Jordanian pilot

The Islamic State of Iraq and Syria (ISIS)' decision to burn alive a Jordanian pilot has sparked outrage in the Muslim world.

Newly-crowned King Salman bin Abdulaziz of Saudi Arabia, which is considered to be the heartland of Islam, condemned the recent action of the Islamic State militants.

According to a report from Saudi-owned television network Al Arabiya, King Salman called the ISIS' most recent killing as an "odious crime" against all values of humanity.

The Saudi Arabia leader also pledged to "intensify efforts to stop extremism and terrorism."

Earlier this week, the ISIS released a video purportedly showing its Jordanian captive, Moath al-Kasasbeh, being burnt alive.

In response, Jordan executed two death-row prisoners, Sajida al-Rishawi and Ziad al-Karbouli, who has supposed links to the al-Qaeda network.

The United Arab Emirates, through its Foreign Minister Sheikh Abdullah bin Zayed Al Nahyan, also expressed outrage over the killing of the ISIS' Jordanian captive.

"This heinous and obscene act represents a brutal escalation by the terrorist group, whose evil objectives have become apparent," he said in a report published on the CBS News website.

Aside from political leaders from Muslim countries, religious leaders also denounced ISIS' move to kill the Jordanian pilot.

For instance, Grand Imam Ahmed al-Tayeb from the Al-Azhar Mosque in Cairo, which is considered to be the world's most prestigious seat of Sunni Islam learning, said IS militants deserve to the Quranic punishment of death.

"Islam prohibits the taking of an innocent life," al-Tayeb said in a report on The Huffington Post.