A ceasefire in Syria has entered its first full day - although there are worries about how long it'll last.

The US and Russia helped secure the 48-hour truce, which came into force at sundown yesterday.

It covers the whole of Syria, except areas held by jihadists, like those from the so-called Islamic State group.

US Secretary of State John Kerry says the ceasefire could be the last chance to work towards peace in the country.