UN envoy lauds significant drop in Syria violence

The UN's Syria envoy on Tuesday applauded a fall in violence through the first 24 hours of a fragile ceasefire but said security concerns meant aid convoys had not yet deployed.

The envoy, Staffan de Mistura, told reporters that the powers which brokered the truce -- the United States and Russia -- would likely provide a full assessment of the pact in the coming days or hours.