BEIRUT/RIYADH, March 23 (Reuters) - Syria and Saudi Arabia have agreed to reopen their embassies after cutting diplomatic ties more than a decade ago, three sources with knowledge of the matter said, a step that would mark a leap forward in Damascus's return to the Arab fold. One of the regional sources identified the official as Hussam Louqa, who heads Syria's intelligence committee, and said talks included security on Syria's border with Jordan and the smuggling of captagon, an amphetamine for which there is a thriving market in the Arab Gulf, from Syria. The United Arab Emirates reopened its embassy in Damascus in 2018, arguing Arab countries needed more of a presence in resolving the Syrian conflict