The main gas pipeline feeding the Syrian capital of Damascus was blown by ISIS fighters on Wednesday, an activist group said.
The Syrian Observatory for Human Rights (SOHR) said ISIS militants blew up the pipeline near the T-4 military airport in the east of the central Homs province shortly after midnight.
The eastern pipeline feeds the outskirts and suburbs of Damascus.
"This pipeline was used to carry gas into the suburbs of Damascus and Homs to generate electricity and provide heating in individual homes," said SOHR head Rami Abdel Rahman.
ISIS has seized a number of oil and gas fields and refineries in Homs province, most recently during its offensive on the ancient city of Palmyra. In the past, the Syrian regime relied on ISIS seized oil fields for fuel and power.
"Any hit to the regime's gas supply is important, because its resources are very low," Abdel Rahman told AFP.
The ancient town of Palmyra fell in ISIS’ grasp in May 21, hundreds of locals were killed during and after the offensive while the greater international scope of attention was directed at the endangered animals and ancient artifacts in the city.
ISIS has also withdrawn from the majority of Syria's northwest Idlib province, where a rebel coalition including ISIS's rival, the Al Qaeda affiliated Nusra Front, has consolidated its control.
Air strikes by forces loyal to regime leader Bashar al-Assad s regularly attack rebel-held areas in Homs and on Wednesday the Observatory reported regime raids killing 10 civilians, including three children in the town of Saraqeb.
Syrian civil war that started in March 2011, has killed more than 230,000 people and forced millions to flee.