Material at two South Belfast bonfire sites has been set alight.
Wood pallets at Sandy Row and Donegall Pass are thought to have been burned overnight.
Images of the aftermath of the two fires appears to show a number of pallets were set on fire, but many were left untouched.
Firefighters were called to the Sandy Row incident at around 8am on Saturday morning. They also sent a single pump to the fire at Posnett Street in the Donegall Pass area.
It is unclear if the two incidents are connected. The fire at Sandy Row has been at the centre of some controversy in recent days over the use of Belfast City Council vehicles to remove pallets from the site for storage. Sinn Fein have complained that the storage, before they are returned to the site, means the Council is “facilitating” an illegal bonfire.
The bonfire has been set alight prematurely in the past, notably in 2015 when its construction appeared to be at a more advanced state when it was burned.