France is to launch a new push for United Nations backing for a ceasefire in Syria that would allow aid into the city of Aleppo after some of the heaviest bombing of the war.
It said civilians in rebel-held eastern Aleppo were being used as human shields and a reduced level of bombardment would allow people to leave for safer areas.
Intense Syrian and Russian bombing of rebel-held areas of the northern city of Aleppo followed the collapse last month of a ceasefire brokered by Moscow and Washington, which backs some rebel groups. The United States broke off talks with Russia on October 3, accusing it of breaking its commitments.
France said Foreign Minister Jean-Marc Ayrault would travel to Russia and the United States on October 6-7 to try to persuade both sides to adopt a Security Council resolution to impose a new truce.
Ayrault has accused Syria, backed by Russia and Iran, of war crimes as part of an "all-out war" on its people. Damascus rejects the accusation, saying it is only fighting terrorists.
Speaking to French television channel LCI, Ayrault said: "If you're complicit in war crimes then one day you will be held accountable, including legally. I think with the Russians you have to speak the truth and not try to please them."
The former prime minister said he would also ask Washington to be "more efficient and engaged" and not allow a laissez-faire attitude to take over just because presidential elections were approaching in November.
