The United States said on July 26 it hoped to announce in early August details of planned military cooperation and intelligence sharing with Russia on Syria, and a United Nations envoy said he would also aim to resume peace talks next month.
US Secretary of State John Kerry said Washington and Moscow, which support opposing sides in Syria's five-year-old conflict, had made progress in recent days towards working more closely together.
The proposals would have the two powers share intelligence to coordinate air strikes against the al Qaeda-affiliated Nusra Front and prohibit the Syrian air force from attacking rebel groups labeled as moderate.
Efforts to bridge the divide between the United States and Russia and bring Syrian government and opposition forces back to negotiations come after pro-government forces have effectively put rebel-held districts of Aleppo under siege.
Concern is growing for at least 250,000 people who have been trapped in rebel-controlled eastern Aleppo since early July, and the UN aid chief asked on July 25 for weekly 48-hour pauses in fighting to allow food and aid to be delivered.
Syrian state television said on July 26 the army had sent text messages to residents and fighters in eastern Aleppo, saying it will grant safe passage to whoever wants to leave and asking militia to put down their weapons.
The Syrian Observatory for Human Rights monitoring group said 25 people, including three women and eight children, were killed in the last 24 hours in the Mashhad quarter of rebel-held Aleppo, when it was hit by barrel bombs thrown from helicopters.
