Deir Ezzor: Syrian government enclave under IS siege

Government forces and allied fighters are rapidly approaching the city of Deir Ezzor in eastern Syria, aiming to oust the Islamic State jihadist group and break a years-long siege.Deir Ezzor city is the capital of an oil-rich province of the same name that borders Iraq.After Syria's uprising broke out in 2011 with anti-government protests, rebel groups and jihadists seized parts of the province and its capital.