At least 1,301 people died during Hajj - Saudi Arabia.
Many of those who perished walked long distances in bright sunshine without appropriate shade, the Saudi health minister stated.
According to Saudi Arabia, at least 1,301 people died during the Hajj, the majority of which were unauthorized pilgrims who trekked lengthy distances in harsh heat.
This year's pilgrimage occurred during a heatwave, with temperatures occasionally topping 50 degrees Celsius (122 degrees Fahrenheit).
According to the official Saudi news agency SPA, more than three-quarters of those who perished lacked legal permission and were walking in the sunshine without appropriate shelter.
According to the agency, some of those who died were old or had chronic illnesses.
Health Minister Fahd Al-Jalajel stated that efforts have been made to promote awareness about the dangers of heat stress and how pilgrims can avoid it.
Health institutions treated roughly half a million pilgrims, including more than 140,000 who did not have a permit, he said, and some were still in the hospital due to heat fatigue.
"May Allah forgive and show mercy to the departed. "Our heartfelt condolences to their families," he stated.
Saudi Arabia has been chastised for not doing enough to make the Hajj safer, particularly for unregistered pilgrims who lack access to amenities such as air-conditioned tents and official Hajj transportation.
Temperatures in Mecca reached 51.8 degrees Celsius, according to Saudi Arabia's national meteorological center.
Countries throughout the world have been providing updates on the number of their nationals killed, but Saudi Arabia had not commented publicly on the deaths or issued an official toll until Sunday.
An Arab ambassador told AFP that 658 Egyptians had perished. Indonesia said that almost 200 of its citizens were killed, while India reported 98 deaths.
Pakistan, Malaysia, Jordan, Iran, Senegal, Sudan, and Iraq's autonomous Kurdistan Region have all confirmed deaths.
Hajj is Muslims' annual trip to the holy city of Mecca. All Muslims who are financially and physically competent must make the trip at least once in their lives.
Saudi Arabia reported that approximately 1.8 million people took part this year.
The impact from the number of deaths, particularly among unregistered pilgrims, has been increasing.
On Saturday, Egyptian Prime Minister Mostafa Madbouly suspended the licenses of 16 travel businesses and submitted their management to prosecutors for facilitating unlawful pilgrimages to Mecca.
Jordan announced on Friday that it has apprehended many travel brokers who assisted Muslim pilgrims' unauthorized trip to Mecca.
Meanwhile, Tunisia's President Kais Saied removed the minister of religious affairs. Hajj visas are awarded to countries on a quota basis and distributed to people through a lottery.
However, due to the costs involved, many people attempt to participate without a permit, risking prosecution and deportation if detected.
Before the Hajj, Saudi police claimed they had evicted hundreds of thousands of unauthorized pilgrims from Mecca.
