Deir ez-Zor , also spelled Dayr al-Zawr, Der Ezzor, Deir Azzor, and other variants (; , , , "Ter Zor"), is the 7th largest city in Syria and the largest in the eastern part of Syria. It is the capital of the Deir ez-Zor Governorate. There were 211,857 people in 2004. It is on the shores of Euphrates River. 