The Syrian army and its allies today recaptured an oilfield from Islamic State near the eastern city of Deir al-Zor in further advances against the militants. <br/><br/>State TV reports that Government forces this week broke through Islamic State lines to reach a government-held enclave of the city besieged for years by the jihadists, and are fighting to reach a nearby air base which IS still surrounds.<br/><br/>The army and militias fighting alongside it seized the Teym oilfield in desert south of Deir al-Zor. Deir al-Zor is in an oil-rich area of Syria.