Dubai: Saudi Arabia said an explosion had hit a dump ammunition that was not used in the southeast region of the royal capital, Riyadh.
Saudi State Television made announcements Wednesday after social media videos circulated from smoke feathers near Kharj.
The TV report said no one was injured in the explosion, which was described as unintentional.
Kharj was close to Prince Prince Sultan Air, who accommodated US troops.
The US military did not immediately respond to a request for a comment.