Indonesia's volcano on 'red alert' after erupting thick plumes of ash into skyline

Indonesia's Mount Sinabug has been placed on "red-alert" after spewing thick plumes of smoke mile into the skyline in a spectacular display.



Residents took footage of the clouds of smoke rising from the volcano's crater, in its latest level of activity since the 2014 eruption.



A Volcano Observatory Notice for Aviation has now placed Mount Sinabug on red-alert - the highest threat level - which generally means an eruption could occur.



Authorities have also enforced a no-go zone 5km from the crater, the agency said.