Greek police said Friday they have arrested a Syrian man over suspected links to the Islamic State group, after his wife complained to authorities that he was beating her and that he was a jihadist supporter.

Islamic State militants are capable of orchestrating and carrying out an attack against the United States, possibly downing an airplane, even after being evicted from their self-declared Syrian capital of Raqqa, the CIA director said Thursday.

Mike Pompeo said the U.S. is threatened by other militant groups as well.

Israel has been promoting the idea that its ties with Arab countries are improving, and some experts say there are signs that shared concerns over Iran are indeed nudging them closer.

Hamas' leader in the Gaza Strip said Thursday "no one" can force it to disarm or recognize Israel, after Washington demanded it meet those conditions as part of a unity government.

"No one in the universe can disarm us. On the contrary, we will continue to have the power to protect our citizens," the Islamist movement's Gaza head Yahya Sinwar said.

Israel responded with tank fire into Syria on Thursday after a Syrian mortar shell landed in the Israeli-occupied part of the Golan Heights, the army said.

"In response to the projectile that hit Israel earlier today, the Israel Defense Forces targeted the sources of fire in the Syrian Golan Heights," it said in an English-language statement.

Former Yemeni president Ali Abdullah Saleh said he has undergone surgery in Sanaa by Russian doctors after a rare suspension of a Saudi-led coalition air blockade.

A Syrian general accused over the 2012 deaths of prominent U.S. journalist Marie Colvin and French photographer Remi Ochlik has been killed by an explosion in the east of the war-torn country.

The Iraqi Kurdish regional government said Thursday it was open to talks with Baghdad after central government forces seized a swathe of disputed territory from Kurdish fighters. 

The Iraqi oil ministry reacted angrily on Thursday after Russian energy giant Rosneft signed a production sharing deal with the authorities in the autonomous Kurdish region without its approval.

The threat of fresh attacks on the West by foreign fighters fleeing the fallen Islamic State stronghold of Raqa is set to dominate a G7 meeting of interior ministers in Italy.