The death toll following a crush at the annual Hajj pilgrimage in Saudi Arabia is now 769 and the number of injured has risen to 934.
Witnesses claimed police had closed entrances and exits to the pilgrims' camp, making the disaster inevitable, while Iran's Supreme Leader accused authorities of "mismanagement".
King Salman has ordered an immediate review into safety procedures.
Pilgrims who witnessed the deadly stampede during the Hajj pilgrimage have blamed Saudi authorities for failing to avert the disaster, while a government minister appeared to point the finger at those that died.
“There was crowding. The police had closed all entrances and exits to the pilgrims’ camp, leaving only one,” the Guardian, citing Agence France Presse, quoted Ahmed Abu Bakr - a 45-year-old man who had escaped with his mother - as saying.
Another witness, 39-year-old Mohammed Hasan from Egypt, said he was worried a similar disaster "could happen again".
He urged authorities to "organise the roads", adding: “Why are they humiliating us like this? We are coming as pilgrims asking for nothing.”
Saudi health minister Khalid al-Falih said in a statement that the pilgrims involved may not have followed instructions.
Earlier an interior ministry spokesman had said the stampede was caused when "a large number of pilgrims were in motion at the same time", adding that authorities were looking into why such an unusually large number had congregated at the same location.
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