Twinkling lights, stars, bells and revolutionary flags are strung above the ancient streets of the old city of Damascus.

Syrian Christians attended Christmas Eve services on Tuesday for the first time since the overthrow of President Bashar al-Assad in early December, in an early test of the new Islamist rulers' pledges to protect the rights of the country's religious minorities.

Protests have broken out in Syria over the burning of a Christmas tree, prompting calls for the new Islamist authorities to take steps to protect minorities. A video posted on social media showed the tree on fire in the main square of Suqaylabiyah, a Christian-majority town in central Syria.