Beirut: More than 500 people, including dozens of civilians, have been killed since a major Russian-backed regime offensive in Syria`s Aleppo province began this month, a monitor said Wednesday.


The Syrian Observatory for Human Rights, which relies on a network of sources for its figures, said the toll of 506 included 23 children killed in Russian air strikes on Aleppo city and its surroundings since the operation was launched on February 1.