Tribesmen have risen up against the extremist Islamic State group in eastern Syria, forcing it to withdraw from three villages after heavy clashes that left more than a dozen people dead, activists said yesterday.

It was the first sign of local resistance to the extremist group since its fighters captured large parts of the oil-rich eastern province of Deir el-Zour in recent weeks.

The Syrian Observatory for Human Rights and Turkey-based activist Mustafa Osso said the group had to bring in reinforcements from Iraq after members of the Shueitat tribe drove jihadi fighters out of the villages.