At least 13 Syrian military personnel were killed in a roadside bomb attack, as their bus crossed a bridge in central Damascus during early morning rush hour on Wednesday.
Syrian state TV posted on its Telegram account images of the charred cabin of the bus, and rescue workers could be seen working through the damage.
The channel reported at least 13 people were killed and three wounded.
Two explosive devices went off as the bus was on the Hafez al-Assad bridge, it said, adding a third device was defused by an army engineering unit in what officials said was a "terrorist" blast.
There have been several attacks this year on army vehicles in eastern Syria by suspected IS militants who still operate in the sprawling desert area
The United Nations says at least 350,000 people have been killed during a civil war that started a decade ago.


Zohran Mamdani wins NYC mayoral race, capping meteoric rise
Kalmaegi death toll climbs to 66 as Philippine survivors confront destruction
At least 7 dead after UPS plane crashes in Kentucky, erupts into ball of fire
Former US VP Dick Cheney dies at 84
Dozens killed, army helicopter downed as Typhoon Kalmaegi hits Philippines
Trump threatens to cut funds for New York City if Mamdani wins mayoral race
Worker trapped under collapsed medieval tower in Rome dies
Saudi Crown Prince bin Salman to visit Trump in White House
