BEIRUT: Jihadists killed at least 90 Syrian regime fighters, civilian security guards and employees when they seized a gas field in Homs province, a monitoring group said on on Friday. The Syrian Observatory for Human Rights described Thursday’s takeover of the Shaar field as “the biggest” anti-regime operation by the Islamic State (IS) since it emerged in the Syrian conflict last year. “At least 90 people, mainly security guards and members of the [paramilitary]National Defense Forces in the IS attack on the Shaar gas field in Homs province,” Observatory director Rami Abdel Rahman said. “Twenty-five of the killed were civilian employees,” he told Agence France-Presse. Footage apparently shot by the jihadists at the gas field and distributed via YouTube showed dozens of bodies, some of them mutilated, strewn across the desert landscape.