Unknown attackers have blown up a pipeline that runs through Egypt's North Sinai and supplies gas to Israel, Egypt's state television reported.
It was not immediately clear what impact Saturday's blast had on gas flows.
"Saboteurs took advantage of the security situation and blew up the gas pipeline," a state television correspondent reported, saying there was a big explosion.
He also blamed the blast on"terrorists".
Residents in the area also reported a huge explosion and said flames were raging in an area near the pipeline in the El-Arish area of north Sinai.
According to a security source, the Egyptian army closed the main source of the gas supply to the pipeline.
"The armed forces and the authorities managed to close the main the source of flow and are trying to control the fires," the source said.