Clouds of ash roll down Indonesia volcano

Video posted on social media captured the fast flow of hot clouds of ash down the volcano and ash blowing over.

Indonesia's volcanology and geological hazard mitigation center warned of a danger of lava cutting roads near the volcano, saying Merapi had spewed "quite intense" hot clouds at least 30 times since Wednesday morning. There were no immediate reports of damage.

Merapi is one of Indonesia's most active volcanoes and is already on the country's second highest alert level.