Two people have died after a maternity hospital was bombed
It is feared only a small number of Syrians trapped in the besieged city of Aleppo have left using humanitarian corridors.
The rebel-held city is surrounded by government forces - but safe passageways were opened yesterday to allow some of the 300,000 citizens leave.
Russia says only 169 civilians have left.
Syrian opposition forces have accused the government of putting on a show.
It comes after two people were killed and several injured after maternity hospital was attacked in the rebel-held province of Idlib.
The building suffered a direct hit and was extensively damaged, according to the Save the Children charity.
It claims babies were injured while in incubators at the hospital.
Around 1,300 women and children are treated by the hospital each month, as it is the only maternity facility for about 70 miles.
There were 340 babies delivered there last month.
"Deliberate attacks on hospitals and medical facilities are serious violations of the laws of war and can never be justified," said Philip Luther, Middle East and North Africa program director at Amnesty International.
"Hospitals, which have special protection under international humanitarian law, should be safe places for mothers, new-born infants and medical workers - even in the midst of a brutal prolonged conflict," he added.