The European Union will provide an additional $39-million in humanitarian aid for people displaced by the violence in Syria.
Syrian forces have fired into Turkey, hitting a refugee camp amid mounting international concern hours before a UN deadline to end the crisis.
Saudi Arabia and Qatar are being urged not to supply weapons to Syrian rebels for fear of hampering efforts to negotiate an end to the crisis.
Syria has told Arab League envoy Kofi Annan that it has begun pulling troops in line with a peace plan accepted by President Bashar al-Assad.
US Secretary of State Hillary Clinton has pledged that Washington would help Tunisia rebuild its economy and democracy as it struggles with reforms.
Hillary Clinton has called for "friends of democratic Syria" to unite against Bashar al-Assad after China and Russia's veto of a tougher UN response.