"You can’t end terrorism with aerial strikes. Troops on the ground that know the land and can react are essential. That is why there haven’t been any tangible results in the two months of strikes led by the coalition," Assad said in an interview with the French Paris Match newspaper published on Wednesday.
Islamic State jihadists have been fighting the Syrian government since 2012. In June 2014, the group extended its attacks to northern and western Iraq, declaring a caliphate on the territories that had fallen under its control.
The United States and its allies started launching airstrikes against IS positions in Iraq in August. In September, the airstrikes were extended to include the group's positions in Syria.