In pictures: Primark building in Belfast gutted in fire
Pacemaker
A police officer at the scene has told the BBC that the building is at "risk of imminent collapse".
Pacemaker
Up to 100 firefighters have been at the scene and the fire service has said the blaze has spread to all floors.
Flames billow from the Primark store in the Bank Buildings on Castle Street, in Belfast city centre.
The fire on the building's roof was reported at about 11:00 BST. Pieces of debris have been falling from the side of the building.
Pacemaker
The original Bank Buildings was designed by Sir Robert Taylor and erected by Waddell Cunningham in 1785. The new Bank Buildings was designed by WH Lynn in 1900
Primark said the store was safely evacuated and there have been no reports of any injuries.
Pacemaker
The building's iconic clock was engulfed in flames.
Pacemaker
Emergency services have been tackling the fire in Belfast city centre since late morning.
Pacemaker
Crowds watched on in astonishment as the blaze spread throughout the building in Belfast city centre.
Pacemaker
The building was evacuated and Royal Avenue cordoned off as the fire spread.