Syrian rebels fired rockets in Aleppo, leaving at least nine dead and scores wounded as the diplomatic focus moved to Moscow where the UN envoy for Syria are negotiating to restore a piecemeal cease-fire .
Aleppo, Syria’s largest city, has been at the centre of violence in recent weeks but was not part of the latest partial truce.
Shells hit a government-held area during morning during rush hour, killing nine people and wounding at least 35, while activists reported two dead in a rebel neighbourhood.
More than 250 civilians have been killed in Syria’s second city since April 22 in an upsurge of violence that has prompted a flurry of diplomacy by Russia, the United Nations and the United States to rescue a teetering February truce between the government and non-jihadist rebels.
The activist Britain-based Syrian Observatory for Human Rights confirmed the shelling of government-held parts of the city, and also said that seven were killed, including a child.
Also in northern Syria, warplanes carried out intense air strikes on the city of Raqqa, the de facto capital of the extremist Islamic State group, in the early hours on Tuesday.
IS suffered major setbacks over the past months in Syria against government forces and US-backed Kurdish fighters including the loss of the central historic city of Palmyra.