beirut hundreds civilians leave besiege islamic state enclave central syria syrian government islamic state reach evacuation deal syrian observatory human right say friday syrian army could reach comment syrian military source quote state media late say army ally capture several areas enclave insurgent source northwestern syria say civilians mostly shepherd enclave straddle border hama homs provinces arrive rebel-held idlib province syrian army support russian air power iranian-backed militias isolate pocket islamic state last presence central syria august eastward drive jihadists military source say army capture areas mazin al-baqr al-mushirfa al-shomalia rasm al-tawil jawra al-nazal observatory report government islamic state finalise deal thursday allow islamic state fighters families civilians leave pocket cross government areas areas hold islamist group cross areas hold tahrir al-sham jihadist alliance include former nusra front group northern hama eastern idlib provinces say others move camp set west enclave government-held areas accordance tribal deal british-based monitor say last week jihadists launch offensive government-held part northern hama province advance south rebel-held idlib syrian government respond strike rebel-held position russia iran turkey previously strike tripartite deal deploy observer force edge designate de-escalation zone idlib islamist militants hold sway idlib reject diplomatic effort syrian army main focus offensive islamic state east country islamist group also face offensive u.s.-backed syrian democratic force civilians leave is-area eastern syria evacuation deal monitor