A good start.
https://www.news.com.au/world/middle-east/death-toll-from-2015-islamic-pilgrimage-to-mecca-reaches-2411-the-most-in-the-rituals-history/news-story/8e9c0f8eaee9b5654b7ae31024881423
Death toll from 2015 Islamic pilgrimage to Mecca reaches 2411, the most in the rituals history