Beijing (AFP) - A 6.5-magnitude earthquake rattled southwest China late Tuesday, killing at least five people, with up to 100 feared dead, according to a government estimate.

Five people died and more than 60 were injured in the quake, the official Xinhua news agency said, including 30 who were in critical condition.

But China's National Commission for Disaster Reduction estimated that as many as 100 people may have perished, based on 2010 census data of the mountainous, sparsely populated region.

Over 130,000 houses may be damaged, it added in a statement posted on its website, based on a preliminary analysis of the disaster in a remote region of Sichuan province.

The quake occurred around 9.20 pm (1320 GMT), not far from the site of a massive 8.0-magnitude earthquake that struck in 2008 leaving 87,000 people dead or missing.

Its epicentre was 284 kilometres (176 miles) north of the provincial capital Chengdu and struck at a depth of 10 kilometres, the US Geological Survey said.

The affected region, Jiuzhaigou county, includes one of the country's most famous national parks, a UNESCO World Heritage Site known for karst formations and lakes.

At least one tourist was killed and four others injured in the park, the state-run People's Daily newspaper said, with more than 100 other people trapped there.

More than 38,000 people visited the tourist site on Tuesday, according to the official Xinhua news agency.

Restaurant owner Tang Sesheng fled her establishment in Jiuzhaigou town after she felt the earth moving under her.

"I was also in Jiuzhaigou in 2008 during the last big quake, so I knew what it was. This felt even stronger," she told AFP by phone.

She said people had come out of their homes to sit out in the town's large public square, far from any tall structures, afraid to go back inside for fear that buildings might topple.

Many were also sitting in cars, thinking it safer.

"People didn't dare grab anything like money or clothes -- we just all ran outside right away."

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Electricity was cut off briefly, but was then restored, she said.

Some houses at the scenic spot collapsed following the quake and authorities were organising young people to help evacuate residents, a staff worker at the park told Xinhua.

Photos from the area posted to social media showed masses of people milling about on streets scattered with light debris, and a taxi dented from being hit by a large boulder.

Over 600 fire officers and soldiers have been deployed, the People's Daily newspaper said.

China is regularly hit by earthquakes, especially its mountainous western and southwestern regions.

Earlier today, a landslide triggered by heavy rains killed at least 24 people in a different, mountainous region of Sichuan to the south of Chengdu.