Syrian opposition armed men killed at least 18government forces while taking over control of new areas in the northwesternprovince of Idleb, the Syrian Human Rights Observatory said Friday.Opposition gunmen retook the towns of Babolin and Salhiya in souther Idleb,ending a year of the government forces' control, killing 18 regime troops anddestroying two tanks, the Observatory added in a statement.Hostilities between the two sides are ongoing in different parts of the country,namely in Latakia, Hama, Idleb and Damascus.