Britain vowed Tuesday to double its investment in cyber-security to counter threats including from the Islamic State group following the Paris attacks claimed by IS which killed at least 129 people.

Prime Minister David Cameron also announced he would make a fresh effort to build support for Britain to join air strikes on Syria, saying there was now a "compelling case" for doing so.

French President Francois Hollande and his Iranian counterpart Hassan Rouhani discussed the war in Syria by telephone on Tuesday, in the wake of a devastating attack on Paris by Islamic State jihadists.

The two leaders highlighted the importance of the Vienna process to end the nearly five-year war, after global diplomats on Saturday agreed on a fixed calendar for Syria to move towards elections in 18 months.

Russia on Tuesday pounded Islamic States targets in Syria after confirming that a bomb attack brought down its passenger jet over Egypt last month, killing all 224 people on board. 

President Vladimir Putin pledged to hunt down and "punish" those behind the attack but did not blame any specific group as he ordered an intensification of Moscow's campaign in Syria, vowing "vengeance."

French police launched dozens of fresh raids across the country Tuesday as warplanes strafed the Syrian stronghold of Islamic State jihadists which France has vowed to destroy after their attack on Paris.

Authorities in France and Belgium stepped up the hunt for more gunmen and possible accomplices to the shootings and suicide  bombings on bars, restaurants and a sports stadium that killed 129 mostly young people on Friday night.

France's president said Monday its Charles de Gaulle aircraft carrier would be deployed to the eastern Mediterranean to boost operations in Syria as Paris intensifies a bombing campaign against the Islamic State group there.

The latest move follows attacks in the French capital, claimed by the jihadist group, which left 129 people dead and hundreds more wounded.

Strikes by the U.S.-led air coalition fighting the Islamic State group destroyed 116 fuel trucks used by the jihadist organization in eastern Syria, the Pentagon said on Monday.

In a statement, the Pentagon said the trucks were destroyed in a single strike on Sunday near Albu Kamal, an IS-held town in Deir Ezzor province along Syria's border with Iraq.

Syrian President Bashar Assad said Saturday that French policy had contributed to the "spread of terrorism" that culminated in attacks claimed by the Islamic State group which killed 128 people in Paris.

In a meeting with a delegation of French lawmakers in Damascus, Assad said France's "mistaken policies... had contributed to the spread of terrorism."

The al-Qaida-affiliated al-Nusra Front announced on Saturday the capture of a number of Hizbullah fighters in Syria.

It said via its Twitter account that three Hizbullah fighters were capture in Reef Aleppo in Syria.

Multiple attacks in Paris claimed by Islamic State jihadists increased the pressure on some 20 countries and organizations meeting in Vienna on Saturday to overcome deep divisions and help end Syria's civil war.

Witnesses said that the gunmen who killed almost 130 people in Friday's wave of attacks shouted "Allahu akbar" ("God is greatest") and blamed French military action in Syria against Islamic State (IS) extremists.

Some 20 countries and international bodies meet in Vienna again Saturday groping for a way out of Syria's horrific civil war, with deep divisions over President Bashar Assad's future and which rebel groups to back.

The second such gathering in two weeks comes as Islamist rebels suffer a number of setbacks in Syria and Iraq at the hands of Assad's army helped by Russian air strikes, and Kurdish forces backed by the U.S.