The people of Thailand are mourning the death of King Bhumibol Adulyadej, their head of state for 70 years and the world's longest-reigning monarch.
An emotional crowd held a late-night vigil in Bangkok for the king, who died on Thursday aged 88.
His body is to be moved to the city's Emerald Temple later on Friday. The official mourning will last a year.
Crown Prince Maha Vajiralongkorn is to be the new monarch, but has asked for a delay before taking over the role.
Flags are to fly at half-mast for 30 days and the government has asked for "joyful events" to be halted for 30 days.
King Bhumibol was seen as a stabilising figure in a country hit by cycles of political turmoil and coups.
He was widely respected across Thailand, and thought of by many as semi-divine.
He had been ill for a long time. When news of his death was announced on Thursday evening, many in the large crowds outside the hospital where he died broke down.
The BBC's Jonah Fisher in Bangkok says the king was Thailand's father figure, a beacon of stability in a divided and worried country. A more uncertain era has begun, he adds.
