Indonesia's volcano in Central Java re-erupted on Fiday morning, a Volcanology Agency official said.

Caption Mount Merapi volcano emits smoke as it is seen from Kinahrejo village near Yogyakarta October 26, 2010. Indonesia's Mount Merapi erupted on Tuesday, prompting terrified villagers to flee and join the thousands already evacuated from its slopes. [Xinhua]

Mount Merapi spewed hot ash by up to over two kilometers high and headed to southeastern by up 3.5 kilometers, the official at Merapi monitoring office post in Yogyakarta heru Saparwoko told Xinhua by phone from Yogyakarta province.

"The mount erupted again at 06:10 a.m. local time, followed by the spewing of hot ash," he said.

It was not clear whether the lave was spreaded from the cracker as it was difficult to monitor it on visual, said Saparwoko.

Mount Merapi with 2,968 meters high located in the border of Central Java province and Yogyakarta province started eruption phase on Tuesday and re-erupted on Thursday afternoon.

There have been scores of internal displaced persons who returned to their homes at the dangerous area on the slope of the mount every morning to feed the reminder of their cattle or to take some of their belongings, authorities at Yogyakarta have told Xinhua.

The eruption has displaced over 40,000 people.

Mount Merapi is one of Indonesia's most active volcanoes. The Southeast Asian country lies in a quake-prone zone called the Pacific Ring of Fire, and now has 129 active volcanoes.

The previous eruption of Mount Merapi in 2006 killed two people. A 1994 eruption claimed 60 lives. A major eruption in 1930 killed more than 1,000 people.