Jakarta, Indonesia (CNN) -- The number of evacuated residents climbed to more than 5,200 Sunday as a volcano in a central Indonesian province erupted again.
Authorities worry that the latest eruption sent smoke so high into the sky that it could affect flights at nearby airports.
Mt. Lokon in the northern Sulawesi province first erupted Thursday night. Since then it has erupted several more times.
There were no immediate reports of casualties.
Indonesia is located on the "Ring of Fire," an arc of fault lines circling the Pacific Basin that is prone to frequent earthquakes and volcanic eruptions.