A suspected Syrian army helicopter dropped barrel bombs on Turkish-backed rebels on Tuesday, the Turkish military said, in what appeared to be the first direct clash with Syrian forces since Turkey launched a cross-border incursion in August.
Syrian and Russian warplanes carried out dozens of air strikes on rebel-held districts of Aleppo on Friday, a monitor said, as world powers prepared for new talks on a ceasefire.
Syrian regime forces advanced in Aleppo on Sunday after Russia unleashed dozens of air strikes in the battleground northern city overnight, a monitor and an AFP correspondent reported.
Warplanes launched some of the heaviest air strikes yet on rebel-held areas of Aleppo on Friday after the Russian-backed Syrian army declared an offensive to fully capture Syria's biggest city.
Huge blazes erupted in Syria's Aleppo as the city was rocked by fighting and air strikes on Thursday, ahead of last-ditch efforts by world powers to salvage a failed ceasefire.
Saudi-led air strikes killed 20 civilians in the rebel-held Yemeni port city of Hodeida late on Wednesday just hours after the rebels celebrated the second anniversary of their seizure of the capital, a government official said.
Air strikes and clashes tested a fragile ceasefire in Syria on Friday as civilians waited for aid and the UN Security Council was to discuss whether to endorse the US-Russian truce.
At least 21 civilians were killed in two separate air strikes by the Saudi-led coalition in northern Yemen on Saturday, residents said on Sunday, as fighting intensified in the country before the Muslim Eid al-Adha feast.
Israel said Monday its forces carried out dozens of air and tank strikes in Gaza in response to a rocket that hit a southern Israeli town.
Boko Haram on Sunday released a video of the girls allegedly kidnapped from Chibok in April 2014, showing some who are still alive and claiming others died in air strikes.
Saudi-led air strikes on a school in a rebel-held province of Yemen have killed 10 children, aid agencies said on Sunday, prompting fresh concerns over civilian casualties in the 17-month war.
Russian air strikes on the Islamic State group bastion of Raqa in northern Syria on Thursday killed at least 30 people, including 24 civilians, a monitoring group said.