"It's complicated, obviously, these are historic, long-time rivalries between groups in the southwest of Syria. Bedouins, the Druze community, and it led to an unfortunate situation and a misunderstanding, it looks like, between the Israeli side and the Syrian side."

US Secretary of State Marco Rubio said there was an agreement to restore calm in Syria by late Wednesday, as he blamed misunderstandings over violence that included Israeli strikes on its neighbor's capital.