The Jordanian King Abdullah and Queen Rania offered their condolences to the family of pilot Muath Al-Kassasbeh who was burned alive by Islamic State (IS) in a video released on Tuesday.

Addressing the nation in a televised speech on Wednesday, King Abdullah expressed his "sorrow and anger" for the death of Al-Kassasbeh who was captured by the militant group in Syria last December after his plane went down.

The King described the IS as a "terrorist, coward group that has no connection with our religion [Islam]," and added that these tough troubles and difficulties "make us stronger and more united."  

"The brave pilot [Muath] died in defence of his people and country, joining other martyrs who preceded him and sacrificed their lives for the sake of Jordan. Today we stand with Muath's family, our people and our military forces in such times that are hard for all Jordanian men and women," Jordan News Agency (Petra) quoted Abdullah as saying.

Queen Rania posted a Quranic verse on her Facebook page that says:" Think not of those who are killed in the cause of Allah as dead. Nay, they are alive, with their Lord, and are provided sustenance."

Jordan is a member of the US-led coalition, which includes other Arab countries, that carries out air assaults against sites controlled by the IS in Iraq and Syria.

Amman executed Sajida al-Rishawi and Ziad al-Karboli, two jihadists, on early Wednesday in response to killing of Muath.