beirut syrian army ally take albu kamal islamic state last major stronghold syria represent end islamic state project region army general command say thursday army say fight last remain pocket country eastern desert army statement say liberation albu kamal city important signal general fall terrorist daesh organization project region statement general command say alongside lebanon hezbollah shi ite militias back iran russia syrian army recently seize swathe land islamic state albu kamal euphrates river locate syria eastern deir al-zor province iraqi border wednesday battle hezbollah force enter iraq iraqi popular mobilisation force cross syria help capture town commander pro-damascus alliance tell reuters wednesday syrian army take last islamic state bastion syria army statement