Two SriLankan Airlines services operating from Australia to Colombo were rerouted overnight amid volcanic activity at Indonesia's Anak Krakatau.
The affected services were flights originating from Sydney and Melbourne.
Volcanic ash can pose a serious hazard to aircraft engines and other aircraft systems, and aviation authorities and airlines may alter flight paths when ash affects or threatens normal routes.
The SriLankan services were rerouted rather than reported as cancelled.
The operational changes were made as aviation restrictions and route adjustments affected parts of the region following the volcanic activity.
Passengers travelling on affected services should rely on the airline's current flight-status information for exact arrival times and any further operational changes.
Because flight paths and delays can change during an active aviation disruption, Sineth News should not publish an exact final delay or route unless confirmed by SriLankan Airlines or another authoritative aviation source.
Anak Krakatau
Anak Krakatau is an active volcano in Indonesia's Sunda Strait.
Volcanic activity in Indonesia can affect regional aviation when ash enters airspace used by international flights, even when an aircraft's origin or destination is outside Indonesia.
The rerouting therefore represents an aviation-safety response and should not be interpreted as cancellation of SriLankan Airlines' Australia services.