More than 1,500 people, including firefighters from Sichuan Forest Fire Brigade, local fire brigades as well as forest farm workers and villagers, have gathered to douse a forest fire which broke out on Sunday in Liangshan Yi Autonomous Prefecture, southwest China's Sichuan province.

The blaze started at around 12:22 p.m. at the junction of Lipu and Gaofang villages in Muli County of Liangshan in a mountainous area 3,200 to 3,500 meters above sea level.

There are no immediate reports of casualties.

The cause of the fire is under investigation.