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Authorities in western Indonesia evacuate more villagers from around Mount Sinabung volcano

In this photo taken with slow shutter speed, hot lava flows from the crater of Mount Sinabung as seen from Tiga Serangkai, North Sumatra, Indonesia, early Monday, June 15, 2015. Authorities have been closely monitoring the 2,460-meter (8,070-foot) -high volcano since June 2 when its status was raised to the highest alert level due to the growing size of its lava dome. (AP Photo/Binsar Bakkara)

In this photo taken with slow shutter speed, hot lava flows from the crater of Mount Sinabung as seen from Tiga Serangkai, North Sumatra, Indonesia, early Monday, June 15, 2015. Authorities have been closely monitoring the 2,460-meter (8,070-foot) -high volcano since June 2 when its status was raised to the highest alert level due to the growing size of its lava dome. (AP Photo/Binsar Bakkara)  (The Associated Press)

Authorities in western Indonesia are evacuating more villagers living near a volcano that's been rumbling for weeks.

Government volcanologist Gede Suantika says at least 28 hot ash avalanches occurred at Mount Sinabung on Monday and that there are indications the crater's lava dome continues to grow in size.

Subur Tambun, head of the local disaster mitigation agency, said hundreds of residents were being evacuated Monday from three villages.

Subur said 99 families were moved from a village on Saturday when the mountain unleashed a new powerful burst, sending hot ash as far as 3 kilometers (2 miles) down its southeastern slopes.

Authorities have been closely monitoring 2,460-meter-high (8,070-foot) Mount Sinabung on Sumatra island since June 2, when its threat status was raised to the highest alert level.