At least 100 others were wounded by the explosions in the city centre’s Zahra district, the Britain-based Syrian Observatory for Human Rights said.
Footage from pro-Damascus television channels showed charred corpses buried among rubble, damage to shop fronts and debris littering a wide area. Many cars were on fire, sending out plumes of black smoke. Wounded people walked around dazed.
State television quoted the governor of Homs as saying at least 25 people had been killed.
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A bomb attack claimed by Islamic State last month in Homs in the west of the country killed at least 24 people as government forces took back some Islamic State-held villages in Aleppo province in the north.
Sunday’s attacks also came a day after government advances against Islamic State. There was no immediate claim from the group, however.
A bomb attack in December which killed 32 people took place after a ceasefire deal that paved the way for the government to take over the last rebel-controlled area of the city, which was a centre of the 2011 uprising against President Bashar al-Assad.
Observatory director Rami Abdulrahman said the attack was the second most deadly of its kind in Homs since 2011, and the deadliest for almost a year and a half.
Violence rages on unabated across the country as world powers and the United Nations push to end the conflict, meeting in Geneva to try to broker a ceasefire.
Peace talks were suspended almost immediately earlier this month as Syrian government forces and their allies, backed by Russian air strikes, intensified assaults against insurgents in Aleppo province.
The latest fighting in the north of the country has displaced tens of thousands of people, many of whom headed for the Turkish border. The exodus added to more than 11 million already displaced by the conflict that has claimed 250,000 lives.
