King Abdullah II of Jordan warned Tuesday that an Israeli-Palestinian peace deal was essential for combating Islamic extremists, saying the conflict served as a rallying cry for jihadists.

Abdullah told the European Parliament that the battle against the Islamic State group in Iraq and Syria was "first and foremost" a fight for Muslim nations to carry out.

The top Communist official in China's Xinjiang said Tuesday that extremists from the mainly Muslim region have been apprehended after returning from fighting in Syria with the Islamic State group.

Zhang Chunxian, party head in Xinjiang, told reporters that the radicals were caught when a terror plot was recently uncovered, reported the Global Times, which is affiliated with the ruling party mouthpiece People's Daily.

Police arrested two suspected jihadists Tuesday in Spain's north African territory of Ceuta on charges of belonging to a group that was "prepared" to launch an attack on Spanish soil, the government said.

"The national police at dawn this morning carried out an anti-terrorist operation which led to the detention in Ceuta of two suspected jihadists," the interior ministry said in a statement.

Free Patriotic Movement leader MP Michel Aoun has promised to hold accountable corrupt officials if he were elected a president, denying that he has made certain political concessions and stressing that he is part of the resistance axis against jihadists and Israel.

“If I were elected president, I would deploy the accountability system and consolidate judicial inspection,” Aoun told al-Akhbar newspaper in a lengthy interview published on Tuesday.

Al-Qaida's Syrian affiliate al-Nusra Front on Monday reaffirmed its allegiance to the global extremist network and denied any plan to break away and become a more internationally acceptable rebel force.

The angry statement followed weeks of speculation on Internet social networks of a split between the jihadist allies.

Four people have been detained over their connections to one of the jihadists who carried out the Paris attacks in January, a judicial source said on Monday.

The four are said to be friends with Amedy Coulibaly, who killed four people at a Jewish supermarket and a policewoman during the January 7-9 attacks.

U.S.-led coalition air strikes on oil refineries run by the Islamic State group in northern Syria killed 30 people, mostly jihadists, a monitoring group said on Monday.

The Syrian Observatory for Human Rights said coalition warplanes launched two strikes Sunday on oil facilities in Raqa province, a stronghold of the extremist group which borders Turkey.

The FBI is investigating a string of hacks that defaced U.S. websites with imagery from the Islamic State jihadist group, NBC News reported on Monday.

Websites including a racecar speedway in the state of Ohio, a Goodwill center in Missouri and a church in Canada were defaced with the radical group's black flag, the news organization reported.

Interior Minister Nouhad al-Mashnouq expressed relief on Monday over the security situation in Lebanon despite fears that he is personally threatened with an assassination bid.

“There is a chance that the security situation in the region further escalates,” Mashnouq said in an interview with the pan-Arab daily Asharq al-Awsat, warning that Lebanon cannot endure any confrontation.

A camp for Syrian refugees that lies behind the Lebanese army's last base on the outskirts of the northeastern border town of Arsal will likely be closed by the Lebanese authorities, As Safir daily reported on Monday.

The newspaper quoted high-ranking sources as saying that the refugees will most likely be placed in different encampments in the eastern Bekaa Valley 10 to 15 kilometers from the border with Syria.