The Syrian Observatory for Human Rights said the aircraft took off from inside the Shayrat base and struck targets near Palmyra

Jets launch raids from Syria base hit by US: Monitor

The attack on the rebel-held town of Khan Sheikhun killed at least 58 civilians

Global outrage after Syria 'chemical attack' kills dozens

Last week the Syrian Observatory for Human Rights said an air strike that hit a school sheltering displaced people killed at least 33 people

Strike in Syria hit militants, not civilians : US general

The Syrian Observatory for Human Rights monitor said the dead included prisoners and prison guards

Air strike on prison in Syria's Idlib kills 16: Monitor

The explosion near a government building in Azaz was believed to be caused by a car bomb

Fuel truck blast kills dozens in Syrian town near Turkish border

A monitoring group reported raids on rebel positions but said it was unclear which side had started the clashes

Syria ceasefire: Clashes reported near Damascus despite truce

A barrage of raids hit Al-Bab on Thursday, killing 72 civilians including 21 children, according to the Syrian Observatory for Human Rights

88 killed in last 24 hours of Turkish raids on IS-held Syria town: Monitor

The coalition confirmed it conducted the air strikes in the area but said it was investigating if civilians were killed

US-led coalition raid 'kills 20 civilians' near Syria's Raqqa: Monitor

It said warplanes struck several locations in the Haas village, including an elementary and middle school, killing a teacher and students

Students among 22 dead in Idlib strikes: Monitor

'People had fallen on the ground and I saw bodies torn to bits,' said one witness

Suicide attack on Syria wedding kills 22

Govt forces also seized the rebel-held Handarat camp to the north of the city

At least 52 killed in govt offensive on eastern Aleppo: Observer

Rebel groups and the government are amassing their fighters for the battle to keep hold of Aleppo city

Hundreds join crucial battle for Syria's Aleppo

The Syrian regime has sent in hundreds of reinforcements after rebel forces announced all-out effort to take the country's second city

Govt, opposition amass fighters for 'great battle of Aleppo'

The rebels said they had opened a new route into Aleppo but rights observers warned it is still too dangerous for use by civilians

Clashes erupt in Syrian capital after rebels claim end of government siege

Britain-based Syrian Observatory for Human Rights said at least 56 civilians were killed in air strikes north of Manbij

Syrian opposition calls for suspension of US-led air strikes

A rebel fighter from Aleppo Revolutionaries group said the army has reached Castello Road and is setting up sand barriers

Rebel-held areas of Syria's Aleppo fully besieged

The bombardment struck the town of Jayrud, 60 kilometres from Damascus

Syria regime shelling leaves 20 dead, including 2 medics

'Three attacks reportedly hit heavily crowded areas including a mosque during prayer time'

25 children killed in air strikes in eastern Syria: UNICEF