WRAPUP 2-More troops rush in to help China quake rescue

(Updates troop numbers and adds details, colour, financial assistance)

By Ben Blanchard

CHENGDU, China, May 14 (Reuters) - China poured more troops into the earthquake-ravaged province of Sichuan on Wednesday to quicken a search for survivors as time ran out for thousands of people still buried under rubble and mud.

Some 30,000 troops will join 20,000 already digging through rubble in the southwest province of Sichuan, where Monday's 7.9-magnitude earthquake crumpled homes, schools and hospitals, the Xinhua news agency reported, citing a Ministry of Defence spokesman.

Across the region there were clusters of weary survivors and rescuers pulling at broken chunks of buildings and peering into crevices in hopes of finding someone still alive.

"There's still people inside, there's still people inside!" shouted a man surnamed Zhang, gesturing at the rubble of a building in Dujiangyan. "There must be a dozen dead people in there," he said.

The national death toll from the quake has climbed past 13,000 and is likely to rise steeply after media said 19,000 people were buried in rubble in just one area of Sichuan.

"It's looking bad. There's food and water coming in, but there's not much hope of many more people coming out alive. You just imagine how we feel," said Li Aomin, a businessman in Dujiangyan.

A near overwrought Chinese Premier Wen Jiabao was shown on state television scrambling over the remains of a collapsed school and using a bullhorn to urge on rescuers.