AMMAN (Reuters) - More than 5,000 people have been killed in nine months of unrest in Syria, the U.N. human rights chief said, as an insurgency began to overshadow what had initially been street protests against President Bashar al-Assad's 11-year rule.

Navi Pillay reported the death toll to the U.N. Security Council as 1,000 higher than the previous toll just 10 days ago. It includes civilians, army defectors and those executed for refusing to shoot civilians, but not soldiers or security personnel killed by opposition forces, she said.