Jihadists shot down a Syrian warplane conducting strikes on the Islamic State group stronghold of Raqa on Tuesday, the Syrian Observatory for Human Rights monitoring group said.

Turkey would welcome exiled leaders of Egypt's outlawed Muslim Brotherhood who have come under pressure to leave Qatar, President Recep Tayyip Erdogan has said.

A Brotherhood official said on Saturday that several members of the group were relocating after Qatar came under enormous pressure from other Gulf Arab states to cut support for the Islamist group.

Israeli police said Tuesday they arrested 22 Palestinians in annexed Arab east Jerusalem overnight on suspicion of throwing stones and petrol bombs, as three months of protests showed no let-up.

It brought to 700 the number of arrests in east Jerusalem since July, police spokeswoman Luba Samri said in a statement, including 50 this month alone.

A bomb hit an Egyptian security force convoy in the Sinai Peninsula on Tuesday, killing six policemen in the restive region where jihadists launch regular attacks.

U.S. warplanes carried out their first air strike on the Islamic State near Baghdad, as world diplomats pledged Monday to support Iraq in its fight against the militants.

The United States early last month began air strikes against IS positions in northern Iraq, but Monday's announcement that the campaign had targeted the jihadists near the Iraqi capital marks an escalation in the scope of the mission.

The prosecution service said Monday it has opened an inquiry after a frontrunner in Tunisia's presidential poll in November,  87-year-old Beji Caid Essebsi, said members of his own party want him killed.

Prosecution service spokesman Allala Rhouma told Agence France-Presse that after statements Essebsi made during a meeting on Friday, an inquiry has begun "and the judge will summon Mr. Essebsi so he can name those implicated."

Two passengers found with ammunition hidden inside toys were arrested on Monday at Israel's Ben Gurion airport, an airport spokesman said. 

One of them, a 36-year-old Israeli man, was arrested as he was about to board an Uzbekistan Airways flight for Tashkent.

Shiite Huthi rebels clashed Monday with Yemeni army forces and loyalist tribes northeast of Sanaa as a UN envoy kept up mediation efforts, tribal sources said.

Fierce gunfights erupted when rebels attacked troops and armed tribesmen in the flashpoint Al-Ghayl district of Jawf province, tribal sources said.

A court in Saudi Arabia on Monday jailed 13 defendants for up to 10 years on charges including joining a radical Islamist group and fighting and supporting fighters abroad.

The 13 were part of a larger cell of 32 and were convicted of "following the Takfiri doctrine," a term usually used to refer to al-Qaida, the official SPA news agency said.

A warplane carried out an air raid Monday on a military base in western Libya held by anti-government militias, in an attack claimed by renegade former general Khalifa Haftar.

State news agency LANA said 15 people were lightly wounded as the raid hit a munitions depot in the town of Gharyan, 120 kilometers (75 miles) southwest of the capital.