Aleppo hospital hit by deadly rebel fire, says state media

Rebel fire on government-controlled areas of Aleppo has killed nearly 30 people including three at a hospital, state media reported on Tuesday. 

Rockets hit al-Dabbeet hospital in the Muhafaza district, killing three and injuring 17, the state news agency SANA said.

SANA said that a further 17 civilians were killed in other government-held areas hit by rebel fire. 

The reports come days after the Syrian government and its key ally Russia were accused of killing 26 people in the bombing of a Medecins Sans Frontiers-backed hospital in the city. 

The Syrian Observatory for Human Rights said rebels had fired on government-controlled western districts of the city throughout Tuesday.

After a lull through the morning, government air strikes on rebel-held eastern areas resumed in the afternoon, an AFP correspondent reported.

UN envoy Staffan de Mistura said a faltering two-month-old truce in Syria, brokered by the US and Russia, must be "brought back on track".

The truce has collapsed in Aleppo where more than 250 people have been killed since 22 April. 

De Mistura spoke before heading to Moscow, where he will hold meetings with Russia's Foreign Minister Sergei Lavrov.

He hailed the truce as a "remarkable achievement" and said Russia and the US should help "make sure that this is brought back on track".

Following the meeting Lavrov said that he hoped a cessation of hostilities could be announced in Aleppo "in the next few hours".

"I am hoping that in the near future, maybe even in the next few hours, such a decision will be announced," Lavrov told reporters. 

US Secretary of State John Kerry warned Syrian leader Bashar al-Assad on Tuesday of "repercussions" if his regime continues to flout a new ceasefire being negotiated for the battered city of Aleppo.

"If Assad does not adhere to this, there will clearly be repercussions and one of them may be the total destruction of the ceasefire and they go back to war," Kerry told reporters.

"There may be even other repercussions that are being discussed but that is for the future to determine."

More than 270,000 people are known to have died in Syria since 2011 although the true figure could be in excess of 400,000 de Mistura has said. The UN stopped compiling casualties for the conflict in 2014.