Double car bomb attacks killed at least 46 people in Syria's central city of Homs on Sunday as international efforts to bring about a ceasefire in the war-torn country floundered. More than 100 people were injured in the twin bomb attacks in the Al-Zahraa district, according to the Britain-based Syrian Observatory for Human Rights monitor. Syrian state television quoted Homs provincial governor Talal Barazi putting the death toll at 32. It broadcast footage from the scene of the attack, showing the air thick with dust and smoke rising from blazes started by the blasts. Homs city is almost completely controlled by the Syrian government, and has regularly been targeted in bomb attacks. Al-Zahraa neighborhood in particular has been hit multiple times, including a double suicide bombing last month that killed 22 people and was claimed by the Daesh group. Most of those killed have been civilians. Among the deadliest attacks to hit Homs was in October 2014, when blasts at a school in the Akrameh district killed 48 children and four adults, prompting residents to protest lax security measures. Demonstrations were also reported in the city after the January bombing in Al-Zahraa, with residents questioning why attackers have been able to strike so many times. Homs city was once dubbed the "capital" of Syria's uprising, which began with anti-government protests in March 2011. But after years of devastating fighting and government sieges, most of the city is now back in regime hands, with the exception of the Waer district, which is being gradually turned over to the government under a deal with opposition fighters. Video footage of Sunday's attacks showed firefighters running through debris strewn by the explosions as security forces and civilians tried to prise open the wreckage of one vehicle to retrieve a person inside. Nearby, a charred body was carried away on a stretcher by emergency services workers past shops with their fronts ripped off and mangled cars and minibuses. The new violence came as international efforts for a temporary ceasefire stumbled, with UN-led talks on how to implement the proposed truce postponed to an unspecified future date.