Activist Osama Mansour said government troops and armored cars entered the city about 100 kilometers (60 miles) from the Iraqi border from four sides, sparking short gunbattles with fighters from the Free Syrian Army.
Mansour, reached by telephone in Deir el-Zour, said the rebels quit fighting and took shelter in homes and apartments, fearing that protracted clashes would destroy the city.
Taking back rebel-held cities in the past weeks, government troops have often heavily shelled neighborhoods before sending in troops, killing civilians and damaging buildings.
"They knew they could not hold control of the neighborhoods, so they decided to stop fighting, knowing that the regime would bring in heavy weapons and kill many civilians," Mansour said.
The rebels also lacked guns and ammunition, he said. Read More