Tibetan youngsters gather outside makeshift tents at a relief center in Kangding on November 23, near where the earthquake struck.

Story highlights

NEW: The death toll rises to five, the number of injured to 54, state media report

The quake hit a mountainous area of Sichuan province

It causes stampede at a primary school that left students hurt

Authorities are still trying to assess the extent of the casualties and damage

Hong Kong CNN  — 

A powerful earthquake struck a remote Tibetan region of southwestern China, reportedly killing at least five people and causing a stampede at a primary school.

It injured more than 50 people and damaged around 25,000 houses, state media reported.

The magnitude-5.9 quake struck late Saturday afternoon in a mountainous area of Sichuan province at a depth of around 15 kilometers (9 miles), according to the U.S. Geological Survey.

Measuring the magnitude of earthquakes

The China Earthquake Networks Center said it had measured the earthquake’s strength at a higher magnitude of 6.3.

The quake left 54 people injured, six of them in critical condition and five others with severe injuries, China’s state-run news agency Xinhua reported Sunday, citing local authorities.

The earthquake prompted students to flee from a primary school in the town of Tagong, near the epicenter, and 42 of them were injured in the ensuing rush, Xinhua said in an earlier report.

Video footage from the region showed panicked people dashing out of buildings as the quake struck.

The area has experienced scores of smaller aftershocks. Authorities say they have sent response teams and relief supplies to the affected region.

Seismic activity frequently affects Sichuan. A devastating earthquake that hit the province in 2008 left more than 87,000 people dead or missing.

What to know about earthquakes