Iran has vowed to take international legal action against Saudi Arabia's rulers over the crush of Muslim pilgrims at this year's hajj, which killed at least 769 people, including 136 Iranians.
The pilgrims suffocated or were trampled to death on Thursday when two massive crowds converged on a narrow street, in the worst disaster to occur during the annual pilgrimage in a quarter of a century.
Shiite Iran has accused its Sunni archrival Saudi Arabia of mismanaging the pilgrimage, which annually draws some 2 million people from 180 countries.
Iranians comprise the largest group of casualties identified so far. Iranian state TV says Ghazanfar Roknabadi, a former ambassador to Lebanon, as well as two Iranian state TV reporters and a prominent political analyst are among those still missing.
"Under international law, this incident is absolutely subject to prosecution. The Al-Saud must be responsive," Iran's state prosecutor Ebrahim Raisi told state TV, referring to Saudi Arabia's ruling family.
He said Saudi authorities blocked a road used by hajj pilgrims to allow a royal convoy to pass through, causing the deadly convergence in the town of Mina on the outskirts of Mecca.
"They have to know that we will pursue the trial of Al-Saud for the crime they have committed against the hajj pilgrims through international courts and organisations."
Iran's Foreign Ministry meanwhile summoned the Saudi charge d'affaires for a third time in three days to protest against Riyadh's handling of the disaster. State TV said Saudi Arabia has yet to issue visas for an Iranian delegation to visit the kingdom to oversee the treatment of injured Iranians and the repatriation of remains.
The Saudi Health Ministry said on Twitter that the death toll in the hajj disaster stood at 769 pilgrims killed and 934 injured, updating previous figures. It did not offer nationalities for the dead and injured.
Iranian state TV said 136 Iranian pilgrims were among the dead and 85 were injured, while 344 Iranians remain missing.
India's government meanwhile raised its estimated death toll of Indian citizens to 18, while Pakistan raised its estimated death toll to 11.
On the final day of the hajj, pilgrims streamed into Mina's Jamarat, a multi-story complex with crowd-monitoring technology and wide ramps for large crowds to perform the final rites of the hajj.
Muslims believe the devil tried to talk the Prophet Ibrahim, or Abraham as he is known in the Bible, out of submitting to God's will in Mina. In one of the final steps of the hajj, pilgrims throw stones at three large pillars in a symbolic casting away of evil.
Saudi security forces were on hand to spray pilgrims with water to help keep them cool as temperatures reached 100 degrees Fahrenheit (38 degrees Celsius). Large fans also sprayed mist to keep the hundreds of thousands of pilgrims performing their hajj rites from over-heating.
Three Saudi officers from the emergency police force at Jamarat were seen attending to a pilgrim who appeared to have suffered from sunstroke.