Jordan has launched new air strikes against the Islamic State of Iraq and the Levant (ISIL) in Syria, a day after King Abdullah II pledged to avenge the death of Jordanian military pilot Moaz al-Kassasbeh.

Jordan's army did not disclose what country was targeted during the operation on Thursday, but Al Jazeera has learned that Abdullah told Kassasbeh's father Safi al-Kassasbeh that the fighter jets flying over their town have just returned from Raqqa, the ISIL stronghold in Syria.

"Planes from the Jordanian Royal Forces have just arrived from al-Raqqa now after bombarding and pounding them," Kassasbeh said after he was given the information by the visiting king.

Al Jazeera's Nisreen El-Shamayleh reports.