Dubai Police carried out a drill to test their ability to respond to an emergency at the Expo 2020 site.
They said the exercise was at 7am on Thursday and aimed to check the “preparedness of concerned security bodies”.
In April, Dubai Police General Headquarters and Expo 2020 Dubai Office carried out a large drill that involved 72 teams from various local and federal security sectors.
The exercise was designed to test the force's rapid response capabilities.
It is now four months until the Expo opens its doors.
Engineers are supervising final structural work on pavilions before the event begins on October 1.
Expo 2020 Dubai: in pictures