Merapi volcano has been placed on level 4 alert less than a day after the level was reduced to level 3. This follows an eruption today which caused 1000 people to flee from the volcano. Most of those who fled three villages on the mountain's southern slopes had returned home earlier Wednesday after spending several weeks in camps. Tuesday's decision to lower the alert level meant that several thousand villagers who had been living in camps were allowed to return home, but they were told to be alert and evacuation trucks remained on standby. A pyroclastic flow traveled 5 km down the mountain and almost reached a village.
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