Dhaka, March 21 -- Mount Lewotobi Laki Laki in Indonesia's East Nusa Tenggara province erupted three times on Friday, sending an ash plume 8,000 meters (26,200 feet) into the sky. Authorities raised the eruption alert to the highest level and expanded the exclusion zone around the volcano.

The eruption, which follows a surge in seismic activity over the past week, has led to flight cancellations and delays between Australia and Indonesia's popular tourist destination, Bali. Officials have also warned of potential lava flows triggered by heavy rainfall.

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Authorities expanded the danger zone from 7 kilometers (4.5 miles) to 8 kilometers (5 miles) from the crater....