An explosion occurred Tuesday night in Syria's rebel-held northwestern city of Idlib, the second to hit the city in one day, a war monitor reported.
The bombing, believed to be caused by an explosive device, took place at the Jara roundabout in Idlib, said the Syrian Observatory for Human Rights.
The Britain-based watchdog group said details about the bombing is still "murky."
Earlier in the day, an explosion targeted a building taken as a command center by the al-Qaida-linked militants Idlib, causing injuries.
The bombing, believed to have been carried out by a female suicide bomber, targeted a building where the so-called Salvage Government of the rebels' Hayat Tahrir al-Sham (HTS) is located.
The observatory said there has been a gunfire between the woman and the guards of the building before the explosion.
The explosions are the latest in a string of bombings taking place in rebel-held areas in northern Syria.
It's worth noting that Idlib is controlled by the HTS, which is the umbrella group of the al-Qaida-linked Nusra Front.