Saudi Arabia is to issue electronic bracelets to pilgrims travelling to Mecca for this year's Hajj, the world's largest Islamic gathering.
It follows a stampede last year in which more than 750 people are believed to have died, with 900 injured.
The bracelets will contain personal and medical information to help authorities care for and identify people, according to the Saudi Press Agency.
Nearly 1,000 new surveillance cameras have also been installed.
The ID bracelets will contain crucial information such as passport numbers and addresses but will also offer information to worshippers, such as timings of prayers and a multi-lingual help desk to guide non-Arabic speakers around the event.
They will be water-resistant and connected to GPS. The information can be accessed by employees of the ministry, and security and services bodies via a smartphone.
