19:00 GMT
The fire is reportedly spreading rapidly across the venue, with a towering column of black smoke and open flames seen above the building. At least one firefighting helicopter has been deployed to the scene to help put out the blaze.
19:17 GMT
At least 40 people have been killed and more than 100 injured in the attack, Russia’s domestic security service, the FSB, has said, citing a preliminary assessment of the incident.
19:33 GMT
A suspect in the mall attack has been detained by law enforcement, the telegram channel Mash reports.
https://www.rt.com/russia/594701-moscow-mall-mass-shooting/