No one claimed responsibility for the attacks, which targeted the Homs oil refinery — one of only two in the country — as well as two natural gas facilities in different parts of Homs province.
Syria has suffered fuel shortages since earlier this year amid Western sanctions blocking imports, and because most of the country's oil fields are controlled by Kurdish-led fighters in the country's east.
State TV said it believes the attacks were carried out by drones and happened at the same time. It said a fire at the Homs oil refinery was soon put under control. The report said the Rayan gas facility and a third installation, also in Homs province, were hit.
Syria's Oil Ministry said the attacks damaged some "production units" in the facilities. It said fires were being fought, and that repairs were already underway in some places.
In June, sabotage attacks damaged five underwater pipelines off the Mediterranean coastal town of Banias in Tartous province.
Syria's oil imports dropped in October 2018 and shortages began in early 2019, largely the result of tighter Western sanctions on Syria and renewed U.S. sanctions on key Syrian ally Iran.
Before the Syrian conflict erupted in 2011, the country exported around half of the 350,000 barrels of oil it produced per day. Now its production is down to around 24,000 barrels a day, covering only a fraction of domestic needs.
In September, a drone and missile attack in Saudi Arabia hit the world’s largest crude oil processing plant, dramatically cutting into global oil supplies. Saudi Arabia says “Iranian weaponry” was used. Iran denies its weapons were involved.