In a Sunday statement, Qassemi expressed deep regret and concern over the reports of the incident, and described the attack as “inhumane and despicable”.
“The cause of such an inhumane act by terrorist groups is the unflinching intellectual, political, financial and military support provided by some regional and trans-regional states for these groups, which are on the brink of annihilation,” he noted.
A chemical attack by terrorists on Syria’s northern city of Aleppo on Sunday left scores of people injured.
The Syrian government says shells fired at an Aleppo neighbourhood have caused breathing difficulties and blurred vision in over a hundred residents.
Most of the victims, some of whom children, have been hospitalized. Health officials said the symptoms suggest that chlorine gas was used in the attack, but terrorists have denied using poisonous substances.
Meanwhile, Syria has called on the UN Security Council to condemn the chemical attack. The Syrian Foreign Ministry says the UN should punish those behind the gas attack.