The incident at a weapons depot follows the reported deaths of scores of Russian mercenaries in a US-led coalition attack last week. A Observatory's website suggested the regime fighters had been trying to access weapons at the depot but set off a booby-trap explosion. It said a total of 23 people were killed, including the 15 Russians. https://www.theguardian.com/world/2018/feb/15/fifteen-russian-security-staff-killed-in-syria-explosion
