Latest: The United States has outlined plans for new economic sanctions against Russia for enabling the government of Bashar Assad in the ongoing crisis in Syria.

Latest: Hundreds of Syrians took to the streets of the capital in a show of defiance following joint air strikes by the United States, France and Britain hailed by President Donald Trump as "Mission Accomplished".

Latest: Russian efforts to veto UN action against Syria left US, British and French allies no option but to launch airstrikes against key installations, Nato chief Jens Stoltenberg said.

Airstrikes have pounded rebel-held eastern Aleppo, killing more than 20 people on the third day of a renewed air campaign there, Syrian activists and rescue workers said.

The northern Syrian city of Aleppo was being pounded by fresh air strikes amid clashes between government forces and rebels, opposition activists said.

Airstrikes have severely damaged two hospitals in eastern rebel-held Aleppo - leading to the death of two seriously ill patients, medical officials in Syria say.

Syria's fragile cease-fire started to unravel on Sunday with the first aerial attacks on rebel-held neighbourhoods of Aleppo and a southern village that killed at least eight people.

Turkey-backed rebels seized a number of villages and towns from Kurdish-led forces in northern Syria on Sunday amid Turkish airstrikes and shelling that killed at least 35 people, according to a monitoring group

A Saudi-led airstrike has killed 14 civilians working on an overnight shift in the Yemeni capital Sanaa, officials say.

Canada will end airstrikes against the Islamic State group in Syria and Iraq by February 22, the country’s prime minister announced, saying “the people terrorised by Isil every day don’t need our vengeance, they need our help”.

An air strike near Syria’s capital Damascus has killed top rebel commander Zahran Allouch, according to opposition activists.

The leader of Labour in Britain has said airstrikes against Islamic State in Syria will increase the chances of terror attacks in the UK in the short-term.

David Cameron's argument for launching airstrikes against Islamic State in Syria has suffered a blow.

David Cameron has urged British MPs to protect the British public by backing air strikes against Islamic State (IS) strongholds in Syria.

Syrian troops have seized a northern village from Islamic State in an advance towards an air base besieged by the extremists for more than a year.

Britain's top military commander claims the UK's "letting down" its allies by not taking part in airstrikes against Islamic State militants in Syria.

Russia's foreign minister has defended his country's airstrikes in Syria.

Russia’s airstrikes in Syria are targeting other terrorist groups as well as Islamic State militants, according to a spokesman for Russian President Vladimir Putin.

The Egyptian military has killed 23 extremists in dawn raids in northern Sinai, security officials said.

Saudi-led airstrikes have targeted Iran-backed rebels and their allies in Yemen.

Saudi-led coalition warplanes bombed Shiite rebel positions across Yemen today as a missile strike on a dairy factory killed 35 workers, authorities said, as both sides disputed who fired on it.

The Saudi ambassador in Washington, Adel al-Jubeir, said the US had been “very supportive” of the Saudi-led airstrike campaign in Yemen both politically and logistically.

The Pakistani military says it has carried out air strikes on militant hideouts in a tribal region along the Afghan border, killing 34 terrorists.