A maternity hospital in a government-held section of Aleppo was struck by rocket fire Tuesday as battles killed 20 people and dragged the contested city in northern Syria deeper into chaos for a 12th straight day.
The new bloodshed came as the diplomatic focus moved to Moscow, where the U.N. envoy for Syria raced to restore a partial cease-fire in the civil war that would include Aleppo.
The envoy, Staffan de Mistura, met with Russian Foreign Minister Sergey Lavrov, one day after meeting U.S. Secretary of State John Kerry in Geneva.
"We need to make sure the cessation of hostilities is brought back on track," de Mistura said.
Aleppo has been at the...