The Syrian Observatory for Human Rights reported that ten members of a Jihadist faction aligned with the Islamic State (ISIS) were killed in an air-strike that hit the town of Sahm al-Jolan on Monday. The Observatory claimed the strike was carried out by Israeli warplanes but offered no proof.

The site of the attack is in the west of Daraa province in Southern Syria. The Observatory reported that ten fighters from the Jaish Khaled Bin Walid group were killed, along with two women believed to be the wives of fighters from the faction. The group pledged allegiance to ISIS but was never formally incorporated into it.

The Observatory said Monday’s strike came several months after 16 fighters from the group were killed in suspected Israeli air strikes in the same area. The Observatory relies on a network of sources inside Syria, and says it determines whose planes carry out raids according to type, location, flight patterns and munitions used.

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The Israel Defense Forces had no comment on the report.

The Observatory said on Monday that ISIS killed at least 128 people in the Syrian town of al-Qaryatayn over a three-week period before the Syrian army recaptured it on Saturday.

The area of the airstrike is near the Syrian border with Israel. Five rockets were fired at the Golan Heights in Israel on Saturday morning. Israel fired back into Syria, hitting three rocket launchers. Though most rocket and mortar fire that hits Israel from Syria is spillover from fighting inside Syria, many in the media and the military have suggested that the recent incident was a result of the Syrian Army intentionally targeting Israel. Israeli Defense Minister Avigdor Liberman blamed Hezbollah, but the IDF issued a statement saying it was still not clear who had fired the rockets.