A bomb attack on an army bus in Damascus on Wednesday killed at least 14 people, followed by army shelling in rebel-held Idlib that killed 11 civilians.
The attack on the rebel-held town of Ariha, which took place shortly after the Damascus bombing, had caused the biggest civilian death toll in the Idlib area since March 2020, the Syrian Observatory for Human Rights said.
There was no immediate claim of responsibility for the Damascus bombing, which hit a bus carrying army personnel in the middle of the city at around 6:45 a.m. (0345 GMT), state television reported.
A military source quoted by state media said the bus was blown up by two bombs that had been attached to the vehicle in advance. A third device was defused by an army engineering unit.
Attacks in Damascus have been rare since the army crushed rebel enclaves around the city with backing from Russia and Iran-backed forces in 2018.
Islamic State militants still operate in the deserts of central and eastern Syrian desert, where they have mounted several attacks this year on army vehicles.
Northwestern Syria is the last major stronghold of rebels fighting Assad. The witnesses and rescue workers said shelling struck residential areas of the rebel-held town of Ariha shortly after the Damascus bomb attack.
Turkey's state-run Anadolu Agency said government forces and Iran-backed groups targeted a marketplace in the Ariha town center.
Reporting by Reuters