The attack, believed to be by Syrian government jets, killed at least 58 people including 11 children under the age of eight in the northwestern province of Idlib, a war monitor and medical workers said.
"President Erdogan touched on the use of chemical weapons against civilians in Idlib. President Erdogan said such inhumane attacks are unacceptable," a statement attributed to presidential sources said.
According to Reuters, they said the two leaders had also emphasized the importance of maintaining the ongoing ceasefire in Syria.