A massive blast ripped through a bus carrying Iranian pilgrims in the Syrian capital on Thursday, killing and wounding up to a dozen people, television stations reported.
The explosion happened in the Saydeh Zeinab quarter of Damascus, which features a Shia shrine frequented by Iranians, according to Al-Jazeera and Al-Arabiya television networks.
Iran's state television reporter that the bus exploded while it was refuelling at a petrol station, about 500 meters from the shrine.
Al-Manar television said the blast could have been caused by a gas bottle carried by the pilgrims in their luggage.
It said among those killed were the driver, his assistant and a mechanic.
Witnesses reported ambulances and fire engines racing to the scene, which was cordoned off by police.