After insurgents toppled Syrian President Bashar Assad this month, many senior officials and members of his dreaded intelligence and security services appear to have melted away. Activists say some of them have managed to flee the country while others went to hide in their hometowns.

Aleppo had been firmly held by the government since a 2016 victory there, one of the war's major turning points, when Russian-backed Syrian forces besieged and laid waste to rebel-held eastern areas of what had been the country's largest city.

Sham, the leading rebel force, must work to allay public fears that it will seek to replace Assadism with its own form of absolute rule.